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A woman has two kids. One is a boy. What are the odds the other is a boy?

Poll: What are the odds?
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100%
1.15%
 1 1.15%
50%
79.31%
 69 79.31%
33%
16.09%
 14 16.09%
25%
3.45%
 3 3.45%
Total 87 vote(s) 100%
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A woman has two kids. One is a boy. What are the odds the other is a boy?
Nikkey
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#99
2009-03-13, 04:19 AM
GummyBear Wrote:Hmm, interesting. I am wondering, if you already know one is a boy, then the next kid is a boy has 50% chance?

Its like you flipped a head, what's the odd that the next one is a head also? That's 50% chance. Goggleemoticon

You can't do it that way. Sigh..

You flip two coins. We know that one of them is head. What is the chance the other is head as well?

We already know that we have double the chance of getting a head and a tail than getting two heads, because this would be the output if we had all combinations:

HH
HT
TH
TT

And so forth. Read upper post for more elaboration.
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A woman has two kids. One is a boy. What are the odds the other is a boy? - by Nikkey - 2009-03-13, 04:19 AM

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