50%

50/50

>>683084521
42, it's always 42.

33%

>>683084521
75%

>>683084612
>>683084617

Retards detected.

>>683084701

Another tard.

48.7%.
The heads side of a coin is marginally heavier, therefore tails shows up just a little bit more often.
Some students wasted time researching it.
Google it if you don't believe me.

0% because they're euros

>>683084793

Another retard thinking he's being clever but completely fucking up the answer.

>>683084793
Additionally. One coin is allready heads, so it's not really part of the equasion. Therefore we're only concerned with the probability of the second coin. So the above percentage is correct.

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1/3, douche canoes.

>>683084870
>Additionally. One coin is allready heads, so it's not really part of the equasion

Complete fucking retard.

Read the question.

>>683084521
89%

>>683084854
>>683084722
trying too hard

100%

>>683084650
>>683084692
>>683084701
What? Are you dumb?

H - H (50%) (Given one is heads)
\ T (50%)
T - H X (0%)
\ T X (0%)

1/4

holly shit guys...

>>683084980
Agreed.

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>>683084980

The problem is that you're not trying hard enough, you fucking simpleton.

The answer is 1/3.

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1 in 3, retards

>>683084521
50/25

>>683085015

HH 1/3
HT 1/3
TH 1/3

Answer = 1/3.

ITT: Retards can't into conditional probability.

>>683085015
>>>683084650 (You)
Whaaat? You never read books, do you?

>>683084521
42

>>683084521
1/3

>>683085079
You fucking idiot. You can't get tails heads because the first one is already heads. The only possible outcomes are heads tails and heads heads, making it 50%

Yet another classic thread, where OP tries to be clever.
The interesting part is, that anyone past high school knows this is 1/3. And everyone knows, that the only reason OP posts this, is because he was stupid enough to answer 50% himself, and now tries to find underaged people to answer wrong, so he himself can feel better about himself...
*golfclap*

>says it's 33%
>replies to everyone who says 50% with "tard"
>never justifies logic

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>>683085367
>the first one is already heads.

No it isn't retard.

AT LEAST one coin landed heads, not THE FIRST coin.

HH
HT
TH

1/3

Congratulations, you're retarded.

>>683085367
You forget one thing, the first coin is a 50/50 chance to get heads, you can't just ignore that 50% in your calculations.

>>683085367
"At least one is heads", not the first one. Meaning it can be tails heads, heads tails, or heads heads

>>683085449
This, so much this

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>>683085452
>>never justifies logic

Maybe you missed these posts

>>683085457
>>683085164
>>683085079

And now this one.

Pic Related: 1/3

Depends on what side was up while it was flipped. It's more probable to land the same way

You guys,

With two coin flips there are four outcomes,

HH
HT
TH
TT

TT must be eliminated because there has to be heads. That leaves with three outcomes, one of which is HH. So, 1/3.

ITT: Retards get butthurt because they thought the answer was 50%

HAHAHAH retarded faggots.

>>683085697
Rather: ITT OP fucked up and thought it was 50%, now tries to justify his stupidity.

25% faggots because its half divided by 2

75%

>>683084521
Which side is heads n a euro?

>>683085851

>this damage control

>>683086035
Exactly! :D
Silly OP

>>683084949
>Given one of the coins landed heads.

>people stil think the answer is 50%
>afraid to post because they will appear dumb as nigger shit

kek

50%

>>683086167

>at least one

>>683086246

Moron or troll?

My guess is both moron and troll.

>>683084521
61.66666%

>>683084521
20%
One of the coins could land on it's edge!

>>683085079
what kind of troll science is this?
the correct answer is 25%. you cannot just remove one result. this is not how probability works.

>>683084521
50/50

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>>683085079
P(B) in this scenario is 1.0 you fucking moron.

Now, what is 0.5 / 1.0 ?

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>>683085164
There is no conditional probability here you moron, the events are independent.

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>>683086403
>this is not how probability works.

Goddamn, you are fucking retarded.
Conditional probability, anon.

The probability of event A (both heads) given event B (at least one heads)

Probability of at least 1 heads for 2 coin flip = 0.75
probability both are heads for 2 coin flip = 0.25

0.25 / 0.75 = 1/3

In the pic, TT is removed from the sample space as it is no longer a possibility GIVEN AT LEAST ONE coin landed heads.

I can't believe people on /b/ are this fucking slow and retarded at math.

1/3 plebs

>>683084521
1/2
Source: i smart

>>683086510

You're retarded. Now explain your retardation so we can all laugh at how stupid you are.

>>683085164

Are you fucking retarded? H/T and T/H are the same fucking result you mong, you aren't flipping three coins.

>>683086735
One has already landed heads
This is now a one coin flip problem
As they are independant events the answer is 1/2

>>683086871
>One has already landed heads

There are 3 equally probable ways to get at least one heads.

There is 1 way to get 2 heads.

1/3.

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>>683086735
>Claims knowledge of conditional probability theory.
>Completely ignores conditional probability theory in his "answer".

Is your father also your brother?

>>683084521
Its a trick question, purely mathematical answer is 33%, normal answer is 50% and if you want to get weird you can even get it to be 25%.

>>683086826
>H/T and T/H are the same fucking result

HAHAHAHHAAH get a load of this retarded faggot.

Yeah, man

penny = heads & quarter = tails

is TOTALLY the same result as

penny = tails & quarter = heads


HAHAHA you fucking mong

The answer is 1/3.

Tails-Tails: nope

Heads-Tails 1/5
Heads-Heads 1/5
Heads-Edge 1/5
Tails-Heads 1/5
Tails-Edge 1/5

The answer is 1/5

>>683086965

>3 equal ways to get at least one heads
>you're only flipping 2 coins

Wew lad

>>683086994

nice b8, m8

>>683087020
>mathematical answer is 33%
>normal answer is 50%

Kill yourself

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>>683086803
>Needs someone to explain division to him.
>Calls the other person retarded.

>mfw

>>683087148

>48 different numbers used in lotto draw
>over 8 million 6 number combinations

How does math work?

>>683087148
>3 equal ways for you to be retarded
>you're only 1 person

wew lad

HH
TH
HT
Are the outcomes if the order the coins are flipped is not random. So it's 1/3.

>>683087185
>is as retarded as Anita Sarkeesian
>unironically uses Sarkeesian gif

kek m80

>>683087288

I can't believe you're unbelievably retarded you are, 1 coin is heads guaranteed, the other is 50/50, leave your basement once in a while

>>683087176
Well if you have a coin on the floor that is heads and you flip another coin, it has a 50% chance of also being heads, anybody how doesnt understand that its a mathematican question will give 50% as an answer and its correct if you ignore the tricky mathematical side of it, nowhere does OP imply that its a math problem and he doesnt even explain how the first heads is produced.

33% if the two coins were different and/or were tossed in a certain order
50% if the two coins are the same and tossed at the same time

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Anyone thinking its 50% should stop and think about it before posting retarded shit.

It's 1/3.

It's obvious most of these people haven't taken statistics, or don't know how to use their brain. It's 1/3

>>683087391

You can't be this dumb. You must be trolling.

>>683087467

>look at me I'm a developer


Kill yourself poor faggot

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>>683084521
>It is a bernoulli experiment
(0|1)
>It is an unconditional probability
(couse each coin toss has 50% heads 50% tails)
I dont have to say more the solution is clear and easy. No need to shitpost.

>>683087412
>Well if you have a coin on the floor that is heads and you flip another coin, it has a 50% chance of also being heads

True. But that's a different scenario to OP question.

>anybody how doesnt understand that its a mathematican question will give 50% as an answer and its correct if you ignore the tricky mathematical side of it

How the fuck can an answer be correct and incorrect at the same time, you spastic?

The answer is 1/3.

>>683087443
>33% if the two coins were different and/or were tossed in a certain order
>50% if the two coins are the same and tossed at the same time

How can you be this fucking stupid?

>>683084521
Why is /b/ so retarded? It says at that one is a guaranteed heads. So the only variable is a single coin which has a 50/50 chance of being heads. It's 50%.

>>683087575

>able to write a simple simulation of conditional probability question
>developer

wew lad, your retardation is showing.

I guess being able to use MS paint makes you a CAD expert too.

>>683084521
fiddy bercent :-DD

>>683084521
It's 1/3, right? h/t does not equal t/h even if the two coins are of the same type

>>683087787

No, dumbass.

2 coins, 4 possible outcomes:

HH
HT
TH
TT

At least 1 landed heads.

TT is no longer possible, leaving:

HH
HT
TH

HH is 1 of those 3

1/3

>>683087678
>True. But that's a different scenario to OP question.
We dont know how the first heads is produced, so how can you say its different? He might just be placing a coin on the floor with the heads side up and then flipping the other coin. All we know is that 1 side is quaranteed to be heads and if you flip 2 coins at the same time 1 coin has to have 2 heads or it will not be quaranteed anymore.
If you ask me, you need to know how the guaranteed heads is produced before you can tell me that the answer is ONLY 33%.

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>>683087845
>It's 1/3, right? h/t does not equal t/h even if the two coins are of the same type

Correct, anon. See some of the explanations in this thread. Also,

Pic Rleated: 1/3

>>683084722
>>683085015
>>683085079
>>683085164
>>683085457
>>683085576
>>683085685
it was never said the order was relevant you autistic shits
HH
HT = TH

50%

>>683087870
There are never 4 possible outcomes. There are only two. Heads and Tails. Heads and Heads. The question is the odds both landed heads. One is guaranteed to be heads. TH and HT are not independent results. They are literally the same result. You are fucking retarded.

>>683088046
>We dont know how the first heads is produced

>two coins were flipped
>at least one landed heads

Seems pretty fucking clear to me, you spastic.

>so how can you say its different? He might just be placing a coin on the floor with the heads side up

>2 coins were flipped
>at least one landed heads

Are you learning yet, simpleton?

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>>683084521
1/3

(11..10..01..00) 00 is cross out coz ther is 1 head at least so 11 is 1/3 of possible outcome

>>683088087
>HT = TH

Holy FUCK you are dumb as pig shit.

If you think that:
penny = heads & quarter = tails

is TOTALLY the same result as

penny = tails & quarter = heads

Then you should kill yourself.

Answer = 1/3

>>683087870
Yeah, but what if one of the coins lands on its' edge?
Coins are 3-dimensional objects.

Wouldn't that make it 1/5, not 1/3?

>>683088193
>Heads and Tails. Heads and Heads.

And tails and heads

3 equally probable outcomes.

HH is 1 of them

1/3

>TH and HT are not independent results.

Oh God, another fucking simpleton.

If you think that:
penny = heads & quarter = tails

is TOTALLY the same result as

penny = tails & quarter = heads

Then you should kill yourself.

Answer = 1/3

Cry moar.

>>683088215
Did he flip them at the same time untill atleast 1 of them landed heads? If so the answer is 33%.
Did he throw them separately and checked the first coin to be heads to avoid a situation of 2 tails? Or does 1 of the coins have heads on both sides?

>>683088468
>Yeah, but what if one of the coins lands on its' edge?
>Coins are 3-dimensional objects.
>Wouldn't that make it 1/5, not 1/3?

No, because the probability of the coin landing on it's edge is negligible.

To be pedantic, the answer is approx. 1/3

>>683088305
what is she looking at?
>>683088307
>>683088473
1 is always heads.
the other one can be H or T. so that's 50%.

>>683084793
That is not correct fo all coins dammit

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>>683084650
yes it wud be intreting to dereie 42 out of 1/3.. whiis 42/14 .. but how u get 14? that sud be the new age of consent

>>683088494
>Did he flip them at the same time untill atleast 1 of them landed heads?

>2 regular coins were flipped
>at least 1 coin landed heads

There's enough information there to get the correct answer.

>Did he throw them separately and checked the first coin to be heads to avoid a situation of 2 tails?

>2 regular coins were flipped
>At least 1 landed heads

This isn't a difficult concept to grasp, anon.

>Or does 1 of the coins have heads on both sides?

>regular coins

Jesus Christ.

>>683088705
14 has always been the age of consent.

>>683088649

Either coin can be tails, just not both.

HH
HT
TH

1/3

Eat it, simpleton.

>>683088649
coins tossed in thin air .. i m jokin she is dead .. too soon

>>683085015

Someone hasn't read Hitchhiker's guide.

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LET'S SETTLE THIS:

To the people who think it's 50%

Answer Pic Related.

>>683088583
>negligible
So, we are just ignoring possibilities we don't think are likely now?

The question doesn't say we're flipping it on Earth, either. Are we just going to assume that too? Maybe we should all just assume the first coin is heads since we can just ignore whatever part of the problem we don't like.

>>683088816
then why am i still flying virgin airline at 29.. o god hae mercy

>>683088830
but it doesn't matter if T is the left one or the right one.

THERE'S A HUGE FACTOR THAT IS IGNORED IN THIS. WHAT FUCKING SIDE IS UP WHEN THEY ARE FLIPPED?

>>683088193

No one can genuinely be this stupid.

>>683088921
>So, we are just ignoring possibilities we don't think are likely now?

No faggot.

The answer is approx. 1/3 taking into account the tiny possibility of either coin landing on its edge.

>>683088770
missed the regular coins part but it still isnt clear if the coins were flipped at the same time or not.
Also i like it how you keep arguing with me even tho we agree that the answer is 33% if we look at the question the way you insist.
At this point you are basically arguing that the coins were flipped at the same time and atleast 1 landed heads even tho OP doesnt say that, but keep going, im interested in seeing how close minded you really are.

>>683088980

Yes it literally does you faggot. Basic fucking probability. They're still independent outcomes.

>>683088980

I know, dumbass.

There are still 3 equally probable ways to get at least 1 heads coin for a 2 coin flip.

Why are you having such a hard time grasping this simple fact.?

In probability, you have to account for all possible results even if the end result is the same.
3 red balls and 4 green balls are in a box. You are trying to figure out the probability of picking out two red balls when you pick out two balls at once out of the box. The correct answer would be 3C2 / 7C2 as opposed to 1C1 / 7C2 because you have to distinguish between each red ball. Similarly, in this question you have to distinguish between H/T and T/H, making the answer 1/3
[spoiler]at least that what I think[/spoiler]

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>>683087358
>"How can I show I wasn't over-rustled by Anita laughing at my wilting manhood?" he thought as his impotent rage threatened to overpower his senses.
>"I know, I'll write something about being cool and ironic".
>Quickly, he tried a few phrases that seemed cool. "You are as retarded as Anita Sarkeesian, I bet that will make me cool" - he tried writing it a few times but the nerd-rage made it difficult to focus and push the right buttons.
>After five attempts he got it down, and he immediately felt his testicles start recovering their normal size.
>"What else can I do? Something about how ironic and meta I am? Yes, if it works to deflect the pain from getting rejected by women, I'm sure it will work here" he thought as he started remembering the many painful rejections he had suffered in his short life. "I'll just point out how ironic I am by calling him unironic, just like all those whores that only date chavs and douchebags". Crying a little about how noone was cool enough to understand him and his fedora, he wrote down the last line while his vision blurred from the tears.
>"I bet I would get friends if only people knew how edgy I can be on 4chan" he thought as he considered hitting the Post button.
>"Maybe I need a finish, something to really show that I'm an oldfag and that I belong here. I bet I could say kek, that would really drive home the message".
>He wrote down kek, got a mild erection from the edginess, and smiled through the tears as heard mom shout "dinnertime" from the stairs above.

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since one of the 2 is already head
it seems to me that we don't count the situation when the 2 coins are tail

> given that at least one of them landed heads

>>683089053
>faggot
Sound more like you're stuck on 1/3 and are too inflexible to include new data into your theory.
You don't even know what kind of coin is being flipped. How can you conclude the outcome is unlikely without knowing the surface area of the edge of the coin in comparison to its faces?

>>683089131
>>683089142
noooo
it's not important if it's TH or HT. it's the same fucking thing.
one coin is 100% H.
the other one has 50% chance to be H.

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>>683089120
>Also i like it how you keep arguing with me even tho we agree that the answer is 33%

I'm not arguing, anon.

>At this point you are basically arguing that the coins were flipped at the same time and atleast 1 landed heads

No, I'm not.

Allow me to explain:

It does NOT matter if the coins were flipped simultaneously, or if they were flipped sequentially, or if a single coin was flipped twice.

In all situations where at least one coin (or flip) landed heads, the probability that both coins (or both flips) landed heads is 1/3

>im interested in seeing how close minded you really are.

I'm not close-minded, anon. I just have the correct answer to a pretty basic conditional probability question.

Pic Related

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>>683089341

>typing this out
>tl;dr

At least you tried, anon.

>>683084521
https://en.wikipedia.org/wiki/Boy_or_Girl_paradox
/thread

>>683089499

Would it be the first coin or the second? It fucking matters. Map it out, you stupid nigger.

>>683089471

Now count how many total possibilities you have there containing at least on heads.

Protip: answer is 3

Coin1 Coin2
Heads Heads
Heads Tails
Tails Heads

Now how many of those is both heads?

Protip: Answer is 1

1 out of 3

1/3

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>>683089536
but it's either HH or TH which is the same as HT.
the order was never a question.
so it's 50%

>>683089488
>You don't even know what kind of coin is being flipped.

nice b8, m8

>>683089499

dubs checked and you're still fucking retarded.

>>683089782

IT'S NOT THE FUCKING SAME YOU NIGGER. BASIC FUCKING PROBABILITY.

>>683089782
>or TH which is the same as HT.

Troll fuck off

>>683089918

Calm down, fam. He's just trolling you.

Answer is 1/3

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>>683089782
>>683089881
>>683089918
>>683089920
1 bitch is give blonde.
the other one can be blonde or brunette.
she has still 50% chance to be blonde or brunette.
so you getting 2 blondes is 50%.
they are identical. it doesn't matter if it's blonde&brunette or brunette&blonde.

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>>683089637
>Thinking it was for you when clearly it was so everyone else could laugh at your impotent rustling.

>mfw

>>683089536
>In all situations where at least one coin (or flip) landed heads, the probability that both coins (or both flips) landed heads is 1/3
yes, but im trying to link this to the real world and not just fuck with maths, in order to get the 1/3 answer we need to ignore the TT results or prevent them from happening, if we prevent it from happening its no longer 1/3 and if we ignore the TT results we are ignoring 25% of the test results.
I like math because im good at it but i hate how its used to come up with totally useless things, such as comparing infinities to eachother and finding out that 1 is bigger than the other, drives me nuts.

HH or HT its 50%. read the question you retards

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>>683090395
fucking this.
50%

>>683090140

>being this retarded

You must be a troll

>>683090150
>thinking anyone actually read it beside yourself

Good job, anon. You really got me.

>yes, but im trying to link this to the real world and not just fuck with maths

What? Do you think math doesn't apply to the real world?

> in order to get the 1/3 answer we need to ignore the TT results or prevent them from happening,

No. Anon, this is a basic conditional probability question. For a regular 2 coin lip, there are 4 equally probable outcomes:

HH
HT
TH
TT

We are told that at least 1 coin landed heads, which eliminates the probability of TT ocurring from that point forward. Only 3 equally probable outcomes remain possible

HH
HT
TH

>I like math because im good at it but i hate how its used to come up with totally useless things

Anon, you need to look up conditional probability. And don't ever become a gambler, seriously.

>>683084521
p(Head|Head) = p(Head and Head)/p(Head) = (1/4)/(1/2) = 1/2

Why is this wrong?

Why is it that people who are good at math can't into probability and people who suck at regular math can?

I mean, seriously, everyone's doing diffgeo no problem, but when it comes to probability, they struggle. The people who didn't even get the definition of a manifold excel in probability

How happen?

>>683090759
>p(Head|Head) = p(Head and Head)/p(Head) = (1/4)/(1/2) = 1/2
>Why is this wrong?

Because p(Head) = 3/4

Now fix your math.

>>683090751
read the question you idiot. one of the flips is already heads

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>>683090751
>>being this retarded
>You must be a troll

nooo
HT is the same fucking thing as TH

there are only 2 possible outcomes:
[HH] OR [TH which is HT]
so you get either HH or fuck up and a variation of TH-HT.
50%
50%
50%
50%
50%
50%

>>683090952
And you base this on what?

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>>683090751
>Implying anyone said those things.

Cry some more bruh, I'm sure mom will comfort you if you scream loud enough.

>>683090952

Probability is often counter-intuitive.

Humans are generally bad at probability.

>>683090751
you're treating

TH
HT

as different cases, that's not the case in this question.

So the result is 50%

>>683091037

Fuck off, troll.

>>683091075

Oh damn, anon. You got me again.

>>683091184
>you're treating
>TH
>HT
>as different cases, that's not the case in this question.

HAHAHAHHAHA you fucking retard.

>>683091057
Anecdotak evidence, which is fine, since I don't have a clue about statistics

>>683091037
You are correct.

We know that 1 of the outcomes will be H.

Thus, P(H|T) = 100% and P(T|H) is 50%.

P(H|H) is also 50%.

>>683084521
How about you shove those coins up your ass faggot?

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>>683091190
you must be really stoopid anon
1 result is always a given H.
it doesn't matter that you flip 2 coins because 1 is always H.
the other one has 50% chance to be H or T.
so you getting HH is also 50%.

it's literally like flipping one single coin and asking will it be H just like the other one?
or will it be T?
so 50%

>>683091255
Are you really this stupid?

The offset from >>683090751
was correct. You originally start with the following cases:

HH
TT
TH
HT

However, we know one side is already heads, thus the only possible outcomes are

> HT
> HH

Now why is TH not included?
Because it's the same as TH.
You're not going to to throw a third different kind of combination here.
Your second coin can only be Tails or Heads.

If you really dont understand this, I cannot help you. Probability is indeed counter intuitive, but the situation where you keep all 4 situations in mind only applies when the 2 coins need to be tossed, not when only one coin is being tossed.

>>683091463
Also, the answer is 50%.

Donald Trump %

>>683084521
Possible combinations all equally likely to happen:
HH, HT, TH, TT. Of those 3/4 have at least one heads. Therefore it is 75%

>>683091584
>Now why is TH not included?
>Because it's the same as TH.

HAHAHAHAHAHA fucking retard.

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>>683091858

>>683091584
It's not the same.

There are three outcomes -

HH
HT
TH

The probabilities for these are
H given H -> 50%
H given T -> 100%
T given H -> 50%

because if the first drop is a T then the second drop MUST be H. Thus, the entire outcome depends on a single roll, and a single independent roll (independent meaning that A|B is the same as A) is 50/50.

>>683091983
HH
HT
TH
TT

gb2 ELI5

>>683084885
1/3

There are four options

H/H
H/T
T/H
T/T

T/T has been ruled out so 1/3

lecturer in statistics here

I'm only going to explain this once. So pay attention.

Anyone who says the answer is 1/2 or 50% is either trolling, misreading the question, or just plain retarded.


Now,

Imagine two coins; coinA and coinB. In fact, conceptualize it in your mind. You take two coins and, using a Sharpie, you mark one of the coins 'A' and the other coin 'B.'

Got that? Are you picturing it? Splendid.

Now you flip both of them.

The possibilities are as follows;

coinA = heads & coinB = heads (HH) 1/4 or 25%
coinA = heads & coinB = tails (HT) 1/4 or 25%
coinA = tails & coinB = heads (TH) 1/4 or 25%
coinA = tails & coinB = tails (TT) 1/4 or 25%


Can you see and understand how heads-tails (HT) and tails-heads (TH) are two distinct and separate possibilities?

No? Congratulations, you're retarded!

Yes? Great, we shall continue.

Now remember that the question states nothing about which coin lands heads, we are only told that AT LEAST ONE of the coins lands heads. This is important, because that statement implies that it could be EITHER COIN.

Note: Nothing about sequence is mentioned. This is also important. There is no 'first coin' and there most certainly is no "the first coin is heads.' No. The question says nothing like that, so don't add information that you can't possibly fucking know and just work with what we've got.

If you have more than two brain cells to rub together, then you understand that there are 4 equally probable/likely possibilities, as shown above.

Now, since we are told that AT LEAST ONE of the coins lands heads, we know that tails-tails (TT) is no longer a possibility. So we are left with three possibilities, of which heads-heads is just one;

HH
HT
TH

The answer is 1/3

The wording of this problem sucks real bad.

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>>683092134
Hahaha, no. You are not a lecturer in anything, you are an edgy 14yo.

>>683092146
50% because TH = HT since the order is redundant.

Now, the next item that needs to be explained to the intellectually challenged is this:

heads-tails (HT) is NOT the same as tails-heads (TH) in logical/probability terms.

This is important and I'm going to explain why. I asked you to conceptualize marking each coin with a Sharpie in the OP. If you still don't understand why HT =/= TH after doing this, then read on:

Take two different coins. Let's say, a penny, and a quarter. Each coin has a 50% chance of landing either heads or tails. You flip both coins. What are the possible outcomes? Well, let's see:

penny = heads & quarter = heads
penny = heads & quarter = tails
penny = tails & quarter = heads
penny = tails & quarter = tails

4 possible outcomes. Each of them equally likely to occur (25% or 1/4)

Now, surely we can all see how the results,
penny = heads & quarter = tails
and
penny = tails & quarter = heads
are different, right? Surely you can see how these are two distinct, separate and equally probable outcomes, yes?

Great, let's continue. Now, it DOES NOT MATTER if you are using two identical coins. HT & TH are two distinct results, and the probability of at least one of them occuring is TWICE the probability of a HH or TT outcome. Remember HT(1/4) + TH(1/4) = 1/2.

So, since we know that TT can't be the result in the OP question, it is discarded, and we are left with the possible outcomes:

HH (1/4)
HT (1/4)
TH (1/4)

Three equally probable outcomes containing at least one heads, hence the answer = 1/3

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>>683092146
hahah, no bruh.

tl;dr.

It's 50%

Without the condition specified, the sample space for the problem is
S = {(H & H), (H & T), (T & H), (T & T)}....(|S| = 4)
Since the event E = TT does not satisfy the condition that there is at least one head, the sample space is
S' = {(H & H), (H & T), (T & H)}....(|S'| = 3)
Thus, given that at least one head is tossed, the probability of two heads is
P(H & H) = 1/3

A more mathematical approach for problems of this sort is to apply Bayes' Theorem, where for two events A and B
P( A given B)
ie
P(A|B) = P(A & B) / P(B)
So in our problem we have
P(H|H) = P(H & H)/P(H)
= (1/4) / [1 - P(T & T)]
= (1/4) / [1 - 1/4]
= (1/4) / (3/4)
= 1/3

>>683092288

Double DUBS checked

1/3

>>683084817
"Regular coin" has nothing to do with what country is from; you fucking faggot.

25% HH
25% TH
25% HT
25% TT

Idiots.

>>683092246
I wish I were. Then I wouldn't be 30 with a PhD in social science crap that doesn't give you a decent job, limited contracts, and lecturing to retarded fuck-ups that don't understand statistics

>>683092288
>>683092396
>>683092559
>>683092693
50% >>683092253

>>683092702
>PhD in social science

U dun fucked up, son.

>>683092828

>being this retarded even after answer is explained multiple times in multiple ways

I hope you're a troll, anon.

>>683092702
cringy.

>>683092253
Let's say there are two girls. A 10/10 and a landwhale. For some reasons you have a 50% chance to land with either of them.

You passed out drunk and you found out you fucked at least one of them, but don't know which one. What is the probability you also fucked the other one?

Now, would you say it doesn't matter whether you fucked the 10 and not the whale, or fucked the whale but not the 10? Is this just the same?

>>683092845
I know, that's what I'm telling you. All I have is playing the smart guy on /b/. So please don't be rude.

Either it is, or it isn't.

Chances are always 50%.

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>>683092985

A hole is a hole is a hole

Yeah answer is 1/3 . i take back my 50% Im an idiot.

>>683092985
yes because one of them still was a lw the other was 10.
doesn't matter which one i fucked.
50%

>>683093149
>Either it is, or it isn't.
>Chances are always 50%.

Either you win the lottery or you don't

50%

^THIS is how retarded the 50% fags are

>>683092985
If you put alcohol in the equation, chances are about 90% you've fucked the landwhale. Landwhales are very good at calculating chances, or they would go extinct.

>>683092396
Epic troll.

Noone that knows Bayes' theorem could possibly think the probability is 1/3. Well played.

>>683093443

HAHAHA nice b8. m8.

Unfortunately for you, not all of us on /b/ are mathematically illiterate, and understand that the answer is 1/3.

Nice reverse trolling attempt though. 7/10

Also, your mother is a cunt whore.

>>683093288
Glad you got my point mate.

People are misinterpreting the question. If you flip 2 coins, both will be tails, both will be heads, or one will be tails and other heads.

They can't both be tails because it says at least 1 landed heads. So either HH, HT, or TH.

The misconception is that HT and TH are the same. They are not. If you flip the coins, either one of them has a chance to be heads or tails. It is easiest to write out all three situations:

First case: throw coins, 1 lands heads and other tails.

Second case: throw coins, the one that landed heads before lands tails and the other one heads.

Third case: both land heads.

It's not about order its about outcome. You have a 2/3 chance that it will be HT or TH because each coin is independent of the other.

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>>683092702
Hahahhahaha, social sciences aren't in charge of the statistics dept. The natural sciences hold those.

>>683086028
The side with the Sultan on it.

>>683093660
Does it matter if you flip them at the exact same time, or one then the other?

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>>683093627
U sound mad. Are u mad?

The answer is 1/3, draw a tree diagram and use condition probability

>>683093902
>Does it matter if you flip them at the exact same time, or one then the other?

No.

>>683093922

I am so angry. SO angry. You really got me mad, anon. SO mad. I am in a rage.

>>683093902
Nope, at least not in op's problem

>>683093995
Fuc u talkin bout nigga?

If I threw up one coin, lands either way,second coin decides the result.
Second coin can he heads or tails. Hence 50% chance both coins have same side up.

>>683093922
Deuce deuce doubles fo' Jimmy.

>>683084521
IT LANDS IN MY BUM BEACUSE IM A MASSIVE FAGGOT IT WOULD SLIP RIGHT IN BEACUSE TIS ALREDY LUBED UP FROM CUM

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k
you have to open 2 doors.
behind one door is ALWAYS your 14 yo cute nude niece who's been cock teasing you since she was 12.
behind the other door there can be either your 14 yo little sister with her petite virgin body OR your ripe 16 yo sister you've deflowered already.
so what are you chances of fucking two 14 year old relatives of yours?
50%

>>683093814
For the autistic low-lifes studying sociology or economics it does here

>>683093660
>TH and HT are the same.

They are not same. But you are making an equally simplistic error in assuming that they have the same probability of occurring. One has a 50% chance, and the other has a 100% chance since you cannot get a T if the first coin is a T. That means TH has a 50% chance of occurring while HT has a 100% chance of occurring. The end result is the same as if HT and TH are the same.

>>683094406
If the doors are open it's hardly a surprise.

>>683088193
This.