Thread 937492888

How smart is /b/?

>>937492888 (OP)
Still 50% because the first coin doesn't determine the outcome of the second flip.

>>937492888 (OP)
66.66. repeating of course, %

%420

>>937492951
You're not very smart, are you?
Read the question and try again.

>>937493051
Also wrong.

>>937493184
It doesn't matter because it's saying "at least one coin lands heads".
The other coin is still 50%.
>H
>H/T
Grow a brain first please.

Smart enough to not use conditional language for independent events.

>>937492888 (OP)
1/3

>>937493293
Dunning Kruger.

I'm going to give you one last opportunity to get the correct answer.

>>937493397
Explain yourself

>>937493551
If you're trying to argue for the "1/3" outcome then state it better:
>HH
>HT
>TH
And,
>TT left out.
HH is only 1/3 of those outcomes.
You need to word your problem better instead of framing it as the toss has any effect on the other coin.
Instead of math lessons start with English please.

>>937493703
There's nothing wrong with the wording, you spastic.

>>937493735
Lol.
>Math dweeb gets defensive about his terribly worded problem.
Meds.

>>937493703
This is the sort of thing kids will get their parents with. The "clever" part is being ambiguous enough that "wrong" answers are more likely.

>>937493790
Yeah it's dumb.
If that many people get your problem wrong than it's the teacher/curriculum creator that's wrong.
Math should be clear and succinct. This is why writing is so important but STEM lords shit all over it.

>>937493755

AI is definitely something you want to stake your future on.

>>937492888 (OP)
Oooo look at the millionaire with TWO coins. Go jerk off with caviar your lordship.

>>937493790
>>937493846
>hurrr the wording

Nah you're just retarded. It's a basic conditional probability question. The wording is fine.

do you think anons in these threads who say 50% are trolling or dumb? its impossible to know i suppose

>>937494460
It would be fine in a statistics class AFTER the words and processes of statistical analysis had been taught.
Blasting it out to people who have not had such training, and then calling them stupid for not knowing specialized language and processes is the retarded part. It's a way of intentionally being ambiguous to make yourself out as smarter than other people when they just haven't been trained and are unfamiliar with figuring this sort of thing out.

>>937494232
Like supports like, I guess.

>>937494601
Where's the ambiguity in the question, faggot?

>>937494503
I guess the second coin could land on the edge.
But what's the likelihood of that?

>>937492888 (OP)
25% (because each quarter is worth 25¢).

>>937494709

Not the person you’re asking, but there seems to be some confusion between the event of the coin flip and the conditional event “both coins land heads if at least one coin lands heads”.

This really is a stupid question.

But I think we’ve all learned about the likelihood of an internet argument over nothing much.

>>937495107
This.

>>937492888 (OP)
50% duh.

>>937493184
KYS. This is literally a trick-question; If this was phrased differently it would be obvious, nigger.

>>937495384
100% BTW

Step 1: List all possible outcomes when two coins are flipped

We’ll assume the coins are fair and distinguishable.

Here are the possible outcomes:

HH (both heads)
HT (first heads, second tails)
TH (first tails, second heads)
TT (both tails)

There are 4 total possible outcomes.

Step 2: We're told that at least one coin lands heads up

So we can exclude the TT outcome.

That leaves us with these 3 possible outcomes:

HH
HT
TH

Step 3: Out of these 3 outcomes, how many are both heads?

Only one: HH

Step 4: Calculate the conditional probability

Final Answer:
⅓

>>937495107
>>937495384

the question is not the one that's stupid, any confusion is the fault of the reader. I genuinely cant tell how you could rephrase the question more clearly that it already is.

>>937493703
It's heads-heads vs. heads-tails; Whether the tails is realized before of after doesn't matter. It's 50%

>>937492888 (OP)
25% I think

>>937495107
>>937495187
>>937495384
>>937495313

Stupid people. Blaming the question for getting the wrong answer.
L
O
L

>>937493755
Fucking cheater, teacher said not to look at others work

>>937495789
>Whether the tails is realized before of after doesn't matter
lol

>>937495867
or* I guess. Sorry for a one-letter mistake. XD

>>937495980
Or "heads or tails" (you still understood).

>>937495980
its 1/3 you dumbo

>>937496477
It's 1/2 because you're only flipping one coin. The other coin is on heads.

>>937496477
>its 1/3 you dumbo
How?
>heads
>50% tails, 50% heads
>50% both heads

>>937496707
See that's the whole problem.
The wording is confusing as fuck.

>>937496707
>you're only flipping one coin.
>two coins are flipped

Can you read, motherfucker?

>>937496730
>>937496737
Oh look, simpletons.

>>937492888 (OP)
100%
They're both double-headed coins.
How else would you guarantee that the first coin flipped is always heads?

>>937492888 (OP)
It's clearly 0%. If one coin has a probability of 50% to land heads, and you flip two coins one of which is guaranteed to do so, then the other should logically be tails. So zero percent.

>>937496752
He obviously means to say "having one coin already decided as heads is the same as flipping only one of the two coins to get another heads (supposing that the un-flipped coin is already on heads)". The chance of getting heads (or tails) is 50%, so the chance of getting heads given that you already have another heads is 50% too.
>>937496821
>Oh look, simpletons.
Still not going to explain how 1/2 is wrong?

>>937497325
AI already answered it for you here >>937493755
, you stupid faggot.

The answer is 1/3. You're dumb as fuck.

>>937492888 (OP)
its 1/3. there two seperate coins each with the possibility of being heads or tails. that's why the possibilities are written out like this: HT, TH, HH

6%

>>937496730
imagine you flipped not two coins, but a hundred coins. and we asked you what are the odds that all of them are heads, if we know atleast one of them is heads? would you still say its 50%? dumbo.

>>937497507
TH and HT are the same, since the fact that there's at least one heads is 100%. There's heads-heads and heads-tails.

>>937497723
>TH and HT are the same
This is a new level of retardation right here

>>937497691
>but a hundred coins. and we asked you what are the odds that all of them are heads
And 99% were guaranteed to be heads...

>>937492888 (OP)
I've done the math over and over again, and the answer is definitely: The goat is behind Door 3.

>>937497786
>And 99% were guaranteed to be heads...
That doesn't match the OP question. It would be at least 99 coins landed heads. The answer to that would be 1/101 but you're too retarded to understand why.

>>937497934
>The answer to that would be 1/101
>Me when I don't know what guaranteed means.

>>937497786
for some reason, you stuck it in your brain that the OP question says that the first coin landed head, and you need to guess the second coin. That was not the question but you just refuse to read the question.

>>937498182
It's coz he's dumb.

>>937498182
>That was not the question but you just refuse to read the question.
Well technically the OP's question was "How smart is /b/?" ;))))))
If I drop two coins into a box, I pick one out and it's heads, then what's the probability that the other coin is also heads (50%)?

>>937498341
That's not the equivalent of the OP question, you stupid fuck. I'm surprised you're this much of a brainlet.

>>937498341
of course thats 50%. its not the same as OP.

>>937498424
The question isn't "if you have all of the possibilities of heads and tails, and you subtract the one(s) where there are no heads, what's the probability of two heads?"

>>937498341
Do not consider the case where both sides show tails. Thus, there are only three possibilities to consider, only one of these 3 shows both heads.

What's so difficult about that?

>>937497674
Kek

>>937493051
damn it leroy

>>937498570
Because the definite heads rules TT out (there are only TH/HT and HH, one H is guaranteed).

>>937498550
Retard, the question is in the OP. Try reading it.

The answer to the question is here >>937493755

>>937492888 (OP)
1/3, because there are three possible combinations of heads and tails where at least one coin is heads, and only one of those three has both of them landing on heads.

>>937498673
>Because the definite heads rules TT out
Yeah that's what he said, you fucking moron, so the possibilities are
HH or HT or TH

1/3

>>937498786
The question is "If there is one head, what's the chance of you flipping another head (the first head is predetermined)".
>>937498901
>the possibilities are
>HH or HT or TH
yes, HT and TH are the same i.e. both heads or not both heads.

>>937499015
>The question is "If there is one head, what's the chance of you flipping another head (the first head is predetermined)".
No it isn't you fucking mongoloid. Read the actual question.

>>937499015
>HT and TH are the same
You are literally fucking retarded.

>>937492888 (OP)
it's 0. i'm never lucky

>>937499067
>Read the actual question.
It is, I'm just paraphrasing—Of course it's not going to be exact (I'm adding clarity).

>>937499139
You're adding stupidity because those are two different questions with two different answers.

>>937499015
>HT and TH are the same

How are those the same? Just because they look the same or what? Are you actually this dumb?

>>937499216
>two different questions
If you preordain heads, how can you have the possibility of tails; You only have HT/TH (same) or HH???

>>937499276
>How are those the same?
If you flip them along the horizontal axis, you'll get the same thing (achirality).

>>937499316
HT and TH are not the same, you simpleton.

If you flip 2 coins, there are 4 equally probable outcomes
HH
HT
TH
TT

3 of those have at least 1 heads.
1 of those 3 is both heads
1 of 3

1/3

>>937499386
You're repeating yourself (adding no new information); I'm sorry but these are baseless assertions (how is having heads and tails different from having tails and heads?)

>>937499492
Because you're retarded, that's how.

>>937499546
You touch yourself? Tails + heads (if you mix them up in a bag) is as likely as heads + tails...

>>937499546
not very.

>>937499386
You are thinking they are flipped one after the other.
But that actually doesn't matter, cause the H in TH is the same as in HT.

seems like people are confusing "At least one coin lands heads" with "One coin will always land heads"
in the first, one coin is rigged or guaranteed to be heads, and >>937499386 applies
in the second, two fair coins are flipped, and you’re just told after the fact that at least one is heads, so it's a 50/50 chance as other anons said
captcha: 8hmdk

>>937501477
got it backwards on accident but you get me right anons? you're smart

>>937500905
No, the first digit refers to the result of coin A and the second digit refers to the result of coin B—they are not the same coin.

I can't shake the feeling that you're just fooling us all. Get a life.

>>937497723
If TH and HT are the same thing then the probability of getting one heads and one tails when flipping two coins normally with no conditions would be 1/3, but hopefully we all understand it's 1/2

>>937501521
Idk, i think its whatever you think it is

>>937500905
It can be two coins flipped one after the other, two coins flipped at the same time or one coin flipped twice. It doesn't matter it doesnt change the 1/3 answer.
>>937499492
>how is having heads and tails different from having tails and heads?
Lets grant that they are the same, even though they're not. And i encourage anyone else who believes its 50% to do this. go ahead and actually flip two coins, flip them about 100 times and record the results, don't bother counting when they're both tails since they don't fit the situation in the problem. After 100 flips your results will probably be close to this.
HT/TH: 50
HH: 25
That means we have 75 times where we met the condition of the question with "at least one coin lands heads" and we have 25 that met the outcome we wanted. 25/75 is about .33