Reply to: Tuesday puzzle

[stek]

It's possible the child could be a herm?

[sasguru]

Incorrect. In your samples more than one is a girl and the question states that *one* is a girl, not at least one.

I can see why you're unemployed.

[TimberWolf]

Good point. So the correct solution to the first is actually 0.

Yep (assuming only two sexes exist).

[OwlHoot]

Incorrect. In your samples more than one is a girl and the question states that *one* is a girl, not at least one.

Good point. So the correct solution to the first is actually 0.

[EternalOptimist]

to get to the same side.

correct

[eek]

ok, last one for eek



why did the chicken cross the mobius tube ?

to get to the same side.

[SimonMac]

Cheers Sassy

It made much more sense the 2nd time.

3rd time, check post 8

[EternalOptimist]

So as EO hasn't added another question.

What came first the chicken or the egg?

ok, last one for eek



why did the chicken cross the mobius tube ?

[Pondlife]

Cheers Sassy

It made much more sense the 2nd time.

[TimberWolf]

The correct way to approach questions like this is to work out the sample space.

Scenario 1: One of a 2 child family is a girl, probabilty the other is a girl.

Sample space:

BG
GB
GG

the question is asking whats the probability of GG - the answer is 1/3

Scenario 2: The first of a 2 child family is a girl, probability the second is also a girl

Sample space:

GB
GG

Probability of GG is 1/2

Incorrect. In your samples more than one is a girl and the question states that *one* is a girl, not at least one.

[sasguru]

The correct way to approach questions like this is to work out the sample space.

Scenario 1: One of a 2 child family is a girl, probabilty the other is a girl.

Sample space:

BG
GB
GG

the question is asking whats the probability of GG - the answer is 1/3

Scenario 2: The first of a 2 child family is a girl, probability the second is also a girl

Sample space:

GB
GG

Probability of GG is 1/2


Seems simple but not working out the sample space leads you to use your intuition and interestingly human intuition is crap in probabalistic situations.

[sasguru]

duplicate

[chef]

So as EO hasn't added another question.

What came first the chicken or the egg?

oo oo I know this, the answer is the egg, I only know this because there was a documentary on Quarks & Co. a few weeks back here on German TV, however, as my German language skills are not 100% then I failed to fully understand the reasoning why.

Ahh here it is Wer war zuerst da - das Huhn oder das Ei? - Quarks & Co - WDR Fernsehen

and after using the magic of google translate the answer is because eggs have been around much longer than chickens have.

[OwlHoot]

boy

Huh?!

[eek]

So as EO hasn't added another question.

What came first the chicken or the egg?