Super Duper Extra Hard Brainteaser
I'll open with a well know semi-easy one:
You know that a woman has exactly 2 children. You ask her if she has at least one girl, and she says yes. What's the probability that she has two girls? Answer in white: <font color="white"> 1/3 </font> Now, suppose that 1% of all girls are named Sarah, and that if a mother had two girls that the mother would not name both of them Sarah You know a woman has exactly 2 children, you ask her if she has a girl named Sarah, she says yes. What are the chances she has two girls? |
Re: Super Duper Extra Hard Brainteaser
I'm getting just under 1/5 but I could well be out.
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Re: Super Duper Extra Hard Brainteaser
For a 140+ IQ you don't seem too confident.
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Re: Super Duper Extra Hard Brainteaser
I am wrong.
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Re: Super Duper Extra Hard Brainteaser
i'd say, 1/3
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Re: Super Duper Extra Hard Brainteaser
I say 1/3 for both, assuming an equal distribution of boys and girls (that a woman is equally likely to have a boy as a girl, not 60/40 or 55/45 or whatever it is in reality).
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Re: Super Duper Extra Hard Brainteaser
[ QUOTE ]
For a 140+ IQ you don't seem too confident. [/ QUOTE ] Should a person with 140+ IQ necessarily be confident? |
Re: Super Duper Extra Hard Brainteaser
</font><blockquote><font class="small">In risposta di:</font><hr />
</font><blockquote><font class="small">In risposta di:</font><hr /> For a 140+ IQ you don't seem too confident. [/ QUOTE ] Should a person with 140+ IQ necessarily be confident? [/ QUOTE ] no |
Re: Super Duper Extra Hard Brainteaser
Now I'm getting 199/399, but still not sure. Give me 5 mins.
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Re: Super Duper Extra Hard Brainteaser
[ QUOTE ]
[ QUOTE ] For a 140+ IQ you don't seem too confident. [/ QUOTE ] Should a person with 140+ IQ necessarily be confident? [/ QUOTE ] in his ability to figure out this xtra hard brain teaser?....yes!! |
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