<PRE><B>Question 424648</B>
Assuming all sex distributions to be equally probable, what proportion of families with exactly six children should be expected to have three boys and three girls?
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# of 6-child families with 3 boys = 6C3 = 20
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# of different boy-girl family patterns: 2^6 = 64
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Proportion: 20/64 = 5/16
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Cheers,
Stan H. 
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