SOLUTION: In a village, there are 64 families each of them has four children. Find the probability that each r number of families has exactly two girls

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Question 1172254: In a village, there are 64 families each of them has four children. Find the probability that each r number of families has exactly two girls
Found 2 solutions by Boreal, ikleyn:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
for 4 children the distribution for number of girls is
1--4---6---4---1
or 4C2(1/2)^2*(1/2)^2=6/16 or 3/8.
There is a 0.375 probability a randomly selected family has 2 girls.
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The wording isn't clear. The expected number of families with two girls is 24, 64*3/8.

Answer by ikleyn(52782) About Me  (Show Source):
You can put this solution on YOUR website!
.

Wording is not only unclear - - - it is incorrect.

Which is even worst, it is totally wrong and nonsensical.