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/lit/ - Literature

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File: 127 KB, 709x657, heads tails.png [View same] [iqdb] [saucenao] [google]
10373235 No.10373235[DELETED]  [Reply] [Original]

/lit/ claims to be smarter than /sci/, yet can't answer basic math questions

really makes you think

>> No.10373241

>>10373235
dunno 0.5

>> No.10373245

>>10373235
25% now fuck off from this board

>> No.10373249

>>10373235

lmao have you even read this board, who is claiming we are smarter?

>> No.10373250

>>10373241
no you're proving his point

there's 4 possibilities, equally likely: HH, HT, TH, TT. The given information rules out TT, so we have HH, HT, TH. So the odds are 1/3.

>> No.10373255

1/3

"One is heads", and you have two coins, so there are three possibilities:

Heads - Tails
Tails - Heads
Heads - Heads
(only tails- tails excluded)

One must account that the coins are different.

>> No.10373257

0% as probability is a chinese conspiracy meant to decrease the genetic stock of strong alpha white males

>> No.10373262

point five to the power of two

>> No.10373271

>>10373235
'bout tree fiddy

>> No.10373275
File: 7 KB, 236x250, 1493907974892.jpg [View same] [iqdb] [saucenao] [google]
10373275

>>10373250

>> No.10373288

>>10373255
>>10373250
baited

>> No.10373310

>>10373250
>>10373255
No because the question is asked before the coins are thrown. You're assuming they are thrown one after the other and that the result of one is already known beforehand (the question makes a requirement not a statement)

>> No.10373316

100%.

First coin has a 50% chance of being heads, second coin also has a 50% chance of being heads. 50+50 = 100. Easy.

>> No.10373317
File: 4 KB, 302x216, retards.png [View same] [iqdb] [saucenao] [google]
10373317

>> No.10373331

ITT: uneducated fucks whose interests stop at the humanities. Google the the hypergeometric distribution you degenerates

>> No.10373341

>>10373331
the problem with the op pic is that it doesnt specify in what manner the trials are dependent

>> No.10373342

>>10373255
ye

>> No.10373343

>>10373257
this

>> No.10373346

>>10373341
whats the issue with the phrasing exactly?

>> No.10373355

>>10373341
This

>> No.10373366

How is it not 1/3? Fuck you fags.

>> No.10373368

>>10373346
It's ambiguous whether you know which one is definitely heads. Given how the real world works, one tends to presuppose that knowing one is heads and knowing which one is heads go together, and that presupposition colors the reading of the text. It should be made more explicit.

>> No.10373389

>>10373341
this
is completely wrong

>> No.10373390

>>10373368
It says "at least one is heads", how is that ambiguous at all?

>> No.10373392

>>10373389
This

>> No.10373396

>>10373235

this is definitely not a "basic math question." It's basically a reformulation of a well-known paradox:

> Mr. Jones has two children. The older child is a girl. What is the probability that both children are girls?

> Mr. Smith has two children. At least one of them is a boy. What is the probability that both children are boys?

> Gardner initially gave the answers 1/2 and 1/3, respectively, but later acknowledged that the second question was ambiguous.[3] Its answer could be 1/2, depending on how you found out that one child was a boy. The ambiguity, depending on the exact wording and possible assumptions, was confirmed by Bar-Hillel and Falk,[4] and Nickerson.[5]

TL;DR being that OP's question is ambiguous, and the answer will depend on how the reader assumes they came about the knowledge that at least on of the coins lands on heads.

see: https://en.wikipedia.org/wiki/Boy_or_Girl_paradox

>> No.10373399

>>10373390
For the reasons I gave after my first sentence.

>> No.10373405

>>10373396
this

>> No.10373409

>>10373396
It only becomes ambiguous if you assume things that are not said, aka you're fucking retarded and are getting baited into the trick.

>> No.10373417

>>10373409
get lost bucko

>> No.10373427

A: *flips 2 coins but doesnt show you*
A: What are the chances both are heads?
B: Well tell me this first, is there at least one heads?
A: Yes, there is
B: ___________

How could you ever interpret the phrasing of "at least" as "the first one" is crazy unless you're ESL or something.

>> No.10373437

>>10373409
this is precisely backwards. The question itself is ambiguous, and it becomes non-ambiguous when you assume things that aren't said. And it is ambiguous in the first place because there is no way to read it as referencing particular states of affairs without assuming things which aren't said.

For example you can read it either as saying

> From all families with two children, at least one of whom is a boy, a family is chosen at random. This would yield the answer of 1/3.

or

> From all families with two children, one child is selected at random, and the sex of that child is specified to be a boy. This would yield an answer of 1/2.

In both cases you are assuming certain things to be true which the question doesn't acknowledge to be true.

>> No.10373444

>>10373389
>>10373392
give one reason as to why

>> No.10373451

>>10373235
Its 50% jesus christ you fucking tards
If one is heads anyway always, then the other coin is either heads or tails, meaning 50% HH or 50% not HH.

>> No.10373453

>>10373437
The first one is using the information given, the other is making an assumption about information not given.

>> No.10373454

>>10373444
this

>> No.10373459

>>10373451
One is not heads always, the image says "at least one is heads". That means you flip 2 coins, look down at both and determine at least one of them is heads. Either of the two can be heads, it doesn't matter, that's why it says "at least one", not "a specific one".

>> No.10373460

>>10373453
There is no such thing as a presuppositionless reading.

>> No.10373466

>>10373460
I really don't understand how you could ever misinterpret this. It even says "You flip two coins", not "You flip one coin and it's heads, then you flip another coin". You flip two, look down, at least one is heads. How is that at all ambiguous?

>> No.10373513

>>10373405
this

>> No.10373563

>>10373459
try finishing high school before posting here

>> No.10373596

>>10373235
it's 50% nigger

>> No.10373604

>>10373466
If you know by looking down, you know which one is heads. Which means it's 1/2 for the other one. If you somehow know that at least one is heads without knowing which one, it's 1/3. None of this is settled by the explicit text.

>> No.10373620

muh credence levels
get fucked /lit/

>> No.10373757
File: 118 KB, 270x411, Profile Pynch.png [View same] [iqdb] [saucenao] [google]
10373757

>>10373235
1/2 cause of the gambler's fallacy

>> No.10373805

Being able to count and being able to put words together are two different skillsets. It's like asking a boxer to play soccer.

That being said you'd have to be pretty fucking dense not to be able to solve a grade school-level math exercise.

>> No.10373829

It must be 1 because heads is plural.

>> No.10373852

>>10373250
>HT, TH

These are the same thing thoughm so the answer is 1/2

>> No.10373860

>>10373235
1

>> No.10373903

>>10373235
>implying the coins ever landed

>> No.10373938

>>10373235
HT
TH
HH
HH
2/4 = 1/2

>> No.10373954

>>10373255
this. except heads-tails/tails-heads is the same thing so really it's 50%

>> No.10373981

>>10373954
It might be the same thing but that doesn't mean you can subtract one of them. It means tere's a 2/3 chance you'll get one heads and one tails.

>> No.10373985

>>10373250
That is retarded, TH and HT are the same. Technically they are not, but is the practical that matters, so the effect is 1/2.

>> No.10373996

>>10373985
Practically speaking, you have a greater chance to get heads/tails than heads/heads!

>> No.10374007

Probability is unreal.

>> No.10374013

It doesn't matter what the other coin toss was, it's still 50/50 for each coin on each individual toss.

It doesn't matter if you flipped 30 heads in a row, the next toss is still 50/50.

>> No.10374023

>>10373310
>(the question makes a requirement not a statement)

Not necessarily, it can be interpreted either way

>> No.10374025

its actually 120%, ie theres a negative 20% chance it isnt heads, nor tails, but somethin ELSE entirely. Thats science, and you can't argue with science

>> No.10374031

>>10373235
Well if at least one is heads then it means you're only testing the probability of ONE coin, the one that isn't automatically heads. So it's 50%.

>> No.10374044

>>10373409
Even if this were the case in the OP (it isn't) you'd still be mistaken: if you couldn't discern non-explicit, non-verbal communication, you'd be severely autistic or otherwise handicapped.

>> No.10374051

>>10374031
>>10373985
This logic doesn't work. Imagine you're due to hangout with friends and they decide if one of them can't make it the other one must arrive. Whats the chances they'll both arrive?

You can't just say Fred is definately going then flip a coin for Doug. They both have to flip which makes it 1/3

>> No.10374052

>>10373235
Your choices are:
T T
T H
H T
H H

Three of those have an H in them:
T H
H T
H H

One of those is the desired result (H H). The probability is 1/3.

>> No.10374062

>>10373444
Are you humanities fags actually this pathetic? A lot of people in this thread are just meming but idk if any of you genuinely understand common sense probability.

Niggas ITT trying to break it down into a philosophical question. This thread is ironically showing this place is full of posturing brainlets.

>> No.10374064

Hide /sci/ threads
Ignore /sci/ posts
Do not reply to /sci/ posters

>> No.10374066

>>10373409
Yet you're assuming the sex ratio is 50:50, really gets ya thinkin

>> No.10374069
File: 71 KB, 761x750, dfwconcern.jpg [View same] [iqdb] [saucenao] [google]
10374069

>>10374062
>math isn't philosophy

>> No.10374074

>>10374051
It's not real life logic, it's the logic of the image posted. It says "at least one is HEADS". So you're only doing one flip.

>> No.10374075

anyone saying 50% i urge you to try the experiment yourself

remember to flip both coins at once and not one at a time

exclude the tt, count the hh and th/ht and see what the results are.

>> No.10374078

>>10374074
>So you're only doing one flip.

Where does it say this?

>> No.10374080

>>10374075
Why would I flip both coins if it's already decided that one is heads?

>> No.10374081
File: 1.71 MB, 500x500, 1465163065978.gif [View same] [iqdb] [saucenao] [google]
10374081

>>10374074
>So you're only doing one flip.
It explicitly states you flip TWO coins though

>> No.10374082

>>10374078

Yeah, that's where humanities might be important, learning how to actually fucking read.

It says, "You flip two coins"

Ever notice how a lot of lawyers have humanities degrees?

>> No.10374085

>>10374078
>at least one is heads

>> No.10374085,2 [INTERNAL] 

.25% for two heads, .75% for 1 head

>> No.10374085,3 [INTERNAL] 

100% possibility of you sucking my head after class <3