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Another Probability Question

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by charlie33 » Sat Feb 28, 2009 4:21 pm
The GMAT of 8 unborn children is to be determined today in a lab. What is the probability that 2 particular children (say the child of Elizabeth and the child of Maria) will be boys?
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Interesting question

by 007.r.mason » Sat Feb 28, 2009 7:13 pm
Assuming that we are only interested in these 2 children (infants to be correct) I belive the answer would be (1/2)*(1/2) = 1/4

Here's why...

An infant can be a boy or a girl.. hence the probability of a boy = 1/2.

Since we are only concerned with those 2 boys.. the probability would be 1/2*1/2 = 1/4

I dont see the relation to other 6 kids since they could be anything...
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by charlie33 » Sat Feb 28, 2009 7:22 pm
Thats the right answer! Good stuff!
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