How smart is Sup Forums?

How smart is Sup Forums?

Other urls found in this thread:

youtube.com/watch?v=7u6kFlWZOWg
en.wikipedia.org/wiki/Monty_Hall_problem
twitter.com/SFWRedditGifs

Niggers

Smarter than you OP. How smart do you think it is to post the same question every day?

5

people are gonna say its 1/3 but real men know its 1/2

>retards think it's 1/2

FTFY

50% we know that 1 is always heads and so can be excluded and because the other coin has a 50% chance,it is 50%

Retard detected.

Either coin could be tails, faggot. Just not both at the same time. 3 equally likely ways to get at least 1 heads coin
HH, HT, TH

Answer is 1/3

You're bad at explaining this, go fuck yourself.

Think about a situation where you just flip two coin, fuck what it says in the OP, Op is a nigger and a faggot.

Now take the results, and get rid of all the TT. Fuck tails. Tails are for furfags, yiff in hell.

3:???

PROFIT. (the results you are left with is the correct probability, which logically would be about 25 for each, if the test was done 100 times, which equates to 1/3)

We know that one will always be heads so that is a 100% chance we can then discount it, regardless of which coin it is, and be left with 1 coin which has a 50/50 chance

Tell me this, what was the question?

Meant to reply to

It's easy to appear smart when you ask the question whilst already knowing the answer.

1/3

For those who havent seen this before, its a propability question made to trick people, short explanation would be that you think we know which coin is heads, but we dont, so HT and TH are different, you can even test this yourself and confirm that it is infact 1/3.

It says "one of them landed heads" not " the first one landed heads" and this changes the conclusion.

If one them is heads, we have:
HH
HT
TH
aka 1/3 for both being heads

if first is heads then:
HT
HH
Which is 1/2 of both being heads.

it also says "were flipped"

>We know that one will always be heads
No, you don't, you retard. 2 regular coins were flipped and at least 1 landed heads by chance. Could be either coin. 3 equally likely ways to get at least 1 heads coin

coin1=heads, coin2=heads
or
coin1=heads, coin2=tails
or
coin1=tails, coin2=heads

1/3

It's right there in the OP.

1/3

wow please tell me this is bait, I can't live in a world with retards like this

But he's right, you moron. Are you b8ing?

1. flip two coins
2. see that one landed on heads
3. calculate the probability that the other one landed on heads
4. see that it's 50%
5. kill yourself when some retard tells you you're wrong
have a nice day

25% because im not a fuckin retard

Using Baye's rule we know the probability to be 1/64

...

if you take a coin and place it heads up, then flip another one the chance of HH is 1/2

if you flip a coin, then place the second one heads up the chance of HH is 1/2


make sense?

/thread

This question is boring, let's do this one:

There are three doors:

[1] [2] [3]

Behind one of these is the prize and you can only pic a single door.

Let's say you chose 1:

l
l
V
[1] [2] [3]

It has been revealed to you that door 3 is not the winner.

Current choice:

l
l
V
[1] [2] [X]

Wanting to choose the door that is most likely to win, which do you choose?

(hint: it is not a 50/50 chance)

it was 1/3 when you chose 1
3 is revealed but you have already chosen 1

Ok, this one is just horseshit.

the question is ambiguous and this thread is bait.

if the statement "at least one is head" is made OBSERVING only one coin:
1/2

if the statement "at least one is head" is made OBSERVING both coins:
1/3

and both are valid interpretations,
the first one is more pratical (why should i want to calculate the probability if i can observe both coins?)
the second is more literal.


arguing if the answer is 1/2 or 1/3 pathetic and retarded.

dude...
if one coin is 100% heads, regardless of which one you observe, the other is 50% heads
there is only one answer

It was 1/3 for door 1 at the start, but what is it now that 3 was eliminated?

Nah, I'd tell you what this problem was called, but that would give away the answer.

nope.
if you are to stupid to understand both answers go back to study math.

Stay in school, kids

>If you are to stupid
>to stupid

I know what it is, it's the stupid fucking goat one and it doesn't make any logical sense no matter how you slice it.

>if you take a coin and place it heads up, then flip another one the chance of HH is 1/2
Yes, but that's not the same as the OP question, you fucktard. OP question doesn't "fix" either coin. Either coin could be tails, just not both at the same time.

Flip 2 coins. At least 1 landed heads. Could be
Heads - Heads
or
Heads - Tails
or
Tails - Heads

All 3 of those are EQUALLY likely.

1/3

/thread

>2. see that one landed on heads

That's not the same as the OP question, moron.

no, faggot. It's a basic conditional probability question and there is one correct answer.

The correct answer is 1/3.

The coin has no memory of the results of the last flips so 50/50 each time, pretty simple

How is it not the same?

>it doesn't make any logical sense no matter how you slice it.

It makes perfect sense. You're just a moron.

1/3 for OP.

Switch for goat problem.

I'm sure what you mean by logical sense, but in terms of just probability it makes total sense.

youtube.com/watch?v=7u6kFlWZOWg

>MFW he tells me to study math
>MFW I study aerospace engineering
>MFW this capcha

No it doesn't. 3 doors, 2 with goats, one with car or some faggot shit. You pick one, then one of the goats is taken away, do you switch your door or not. It makes NO fucking sense that switching would change a fucking thing but you're gonna sit there and tell me it does.

Because you're not told which specific coin (i.e. you do not see) landed heads. you are only told that at last 1 landed heads.

For a 2 coin flips, there are 3 equally probable ways to get at least 1 coin landing heads. Pic Related

1 of those 3 ways is both heads.

1 of 3 equally likely outcomes

1 of 3

1/3

It doesn't matter which coin it is if one is guaranteed to be heads. So you only have to account for one coin when calculating probability in this case.

>Switch for goat problem.

The people saying it's 1/3 aren't taking their own point into consideration.
If #1 is heads the options are
HT
HH

If #2 is heads the options are
TH
HH

So the outcomes are
TH
HT
HH
HH

It's still double heads 1/2 of the time.

It is 50/50 because you are fucking retarded and you haven't explained the rules of reveleaing doors.

if you don't explain
>the door revealed is never your choice
>the door revealed is always a wrong one
>you ALWAYS have the chance to change
the problem is stupid, and in the situation you explained the answer is 50/50

if you explain them, it is better to change (2/3)

sorry i missed a letter. grow up

You pick door 2
Too tired to explain
Fuck off back to year 2 in engineering uni

nice table but you forgot t t

Flip a physical coin, x times, results? Oh, you had only two possible values? Damn I thought-

75%

>No it doesn't. 3 doors, 2 with goats, one with car or some faggot shit. You pick one, then one of the goats is taken away, do you switch your door or not. It makes NO fucking sense that switching would change a fucking thing but you're gonna sit there and tell me it does.

You retarded fuck. Let me explain.

instead of 3 doors, let's say there are 100 doors.

Behind 1 door there is the prize, a car.

behind the other 99 doors are goats.

You pick a door at random.

your chance of winning the car is 1 out of 100 (1/100) at this point.

that means that there is a 99/100 propability that the prize is behind 1 of the doors you did not pick.

now I open 98 losing doors, revealing goats behind all of them.

you are left with the door you picked (1/100 chance)
and one other door (99/100 chance)

If you switch, you are 99 times more likely to win teh car.

Do you understand?

you should always switch.

Answer to OP is 1/3

You don't have to know which one is heads to elimate one of the coins. It doesn't matter which one is heads. HT and TH can't both be possible if one coin is already heads.

This thread reminds me so much of finger boxes and flat earth. wonder why?

Fuck, never mind. Every fucking time this comes up I have to have someone re-explain it. I should just bookmark that video under 'CLICK THIS BEFORE YOU SAY IT DOESN'T MAKE SENSE'.

*eliminate

the people in this thread must be fucking baiting

if there is a 100% chance that one of the coins will be heads, it might as well be taken out of the question. What we're left with is ONE (1) coin, with a 50% chance of landing heads.

my god

There is a 50% chance that the unknown coin is heads, meaning there is a 50% chance that both are heads.

>mfw when i don't care about your opinion because i know i'm correct

Yea yea, fuck off... I'm a tard, I know. Stupid fucking goats.. I'M NOT GOING TO BE ON A GAME SHOW ANYWAYS WTF DOES IT MATTER!

But if you started with only the two doors, the chance would be 50/50

It could be heads or tails.
2 possible values.
Divide 100% / 2.
Simple stuff, this is a long gone meme

>if one is guaranteed to be heads.
>guaranteed to be

No coin was guaranteed to be heads, you retarded fuck. At least 1 coin landed heads by chance. it could be EITHER coin or botch, meaning that EITHER coin could be tails, just not both at the same time.

There are 4 possible outcomes when you flip 2 coins. Both tails (TT) is the ONLY outcome not possible given the condition that at least 1 coin landed heads.

the other 3 outcomes (HH, HT, TH) are all still possible AND equally likely.

1/3

>The people saying it's 1/3 aren't taking their own point into consideration.

HAHA, let's see where this retard takes us.

>If #1 is heads the options are
>HT
>HH
Correct

>If #2 is heads the options are
>TH
>HH
Correct

>So the outcomes are
>TH
>HT
>HH
>HH

You just listed 1 result (HH) twice, you stupid faggot.

there are 3 possibilities
HH
HT
TH

1/3

>nice table but you forgot t t
TT isn't possible given the condition that at least 1 landed heads, fam.

That changes the dynamic though, the probability at the get-go is 50-50, there's no doors to take away.

>i don't care about your oppinion but im gonna reply annyway

>replying means caring

>still replying

Still better than FB fap threads

seeHT and TH can't both be possible at the same time if one coin is already heads

>It is 50/50 because you are fucking retarded and you haven't explained the rules of reveleaing doors.

The host wouldn't explain the rules or the math to the contestant, these conditions are implied anyway so the wording wouldn't change the answer.

>HT and TH can't both be possible if one coin is already heads.

Hmm, let's see.

The condition: At least 1 coin landed heads.
Does HT contain at least 1 heads? Yes
Does TH contain at least 1 heads? yes

Both are possible, faggot, as is HH. Only TT is not possible given the condition.

1/3

still doesn't mean i care about your answer to question

>if there is a 100% chance that one of the coins will be heads

There isn't. Now try again.

True, true

en.wikipedia.org/wiki/Monty_Hall_problem

>How smart is Sup Forums?

Smart enough to not eat the bait.

>There is a 50% chance that the unknown coin is heads
>unknown coin

Both coins are variable, retard. Either could be tails, just not both simultaneously.

1/3

they cant be the both possible at the same time because they are different.
in both TH and HT one coin is heads, we dont know which one, so they are equally likely.

please tell me you are either bating or learning.

both are possible, but not at once
so its the probability of getting (HT or TH) or HH which is 50%

>guys i don't care
>rly i mean it
>pls listen to me
>look at me i dont care

>Replying
Baited though

It's alright, fam. Calm down. Probability is counter intuitive.

we don't know which one but we do know it's one of them so we treat both as one option
therefore 1/2

ofc if the host apply the rules without telling you the probability is 2/3.

but if you ask the question you still have to explain them.

it like if i say to you "i throw a dice what is the chance of 1" but i don't tell you how many faces the dice has.
ofc the probability is only one, but if you don't have the rules you can't calculate it.

hah, stupid idiot.
I take the bait because there is no hook, think of it as a old man sitting in the part throwing pieces of bread for ducks to eat, im the duck and i enjoy the feast while the old man feels a bit better about himself.

>HT and TH can't both be possible at the same time

Wow, really? What a fucking revelation, retard.

Guess what else?
HT and HH can't both be possible at the same time

and do you know what else?
HH and TH can't both be possible at the same time

Amazing, huh?

1/3

we cant treat 2 separate things as one option, are you fucking stupid?
test is, you have 2 coins right? or are you afraid that you are wrong?

You're fucking retarded.

Answer the pic related if you're not b8ing.

I see where some of you are wrong. Some of yah are thinkin that one is already set at heads but it aint. Its just confirmed that one would be heads so it could be tails-heads, heads-heads, or heads-tails. Understandable mistake for sure.

Probability is HH

your counter is that
T H, and H T are different values

if T+H =/= H+T is the math you have learned that what is
XY = YX ?

This isn't some pemdas shit you're just autistic

>shit the question is too hard i can't solve it
>better shit post

TH, HT and HH are all separate events, you stupid fuck.

1/3

It doesn't matter which landed heads first, I'm sure you can prove that by using two coins in front of you.

This isn't addition or multiplication, you thick cunt. It's conditional probability.

HT does not mean H x T.

Jesus fuck you better be trolling.

1/3

If i fuck your mom you're saying there's two events because she fucked me

Us bombed Hiroshima

Hiroshima got bombed by US
US bombed hiroshima

is still the same event autist

guy look

two coins are flipped -> they're already flipped, they WILL NOT change
ONE of them is HEADS -> WE DON'T KNOW WHICH ONE
so far, our options are HH, HT, TH
Considering the case it was HT it's impossible for TH to have been an option
Considering the case it was TH it's impossible for HT to have been an option
so if it was HT the probability is 50%
or if it was TH the probabilty is still 50%

they're mutually exclusive

>changing the subject
are you mad, kid?

two possibilities, one head and one tails or two heads.

So 1 in 2 chance