SOLUTION: Alice and Bill are planning to have three children. (Assume that it is equally likely for a boy or a girl to be born.) What is the probability that at least one will be a girl?

Question 991112: Alice and Bill are planning to have three children. (Assume that it is equally likely for a boy or a girl to be born.)
What is the probability that at least one will be a girl?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let's do it backwards.
Assume none of them are girls, so they're all boys.

So then the complement, at least one girl, would be,

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