SOLUTION: If a single family having one girl is 1/2, then what is probability of a family with 3 children having at least 2 girls?

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Question 1133445: If a single family having one girl is 1/2, then what is probability of a family with 3 children having at least 2 girls?
Answer by Boreal(15235) About Me  (Show Source):
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At least 2 girls is 2 and 3
probability of 2 girls is 3(1/2)^3 or 3/8
probability of 3 girls is (1/2)^3=1/8
The total probability is 1/2.