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 1125563: 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 Theo(13342) (Show Source): You can put this solution on YOUR website!
if the prbability of getting a girl is the same as the probability of getting a boy, then the probability of getting a girl is .5.

the probability that at least 1 is a girl is 1 minus the probability that non are girls.

the probability that none are girls is .5 * .5 * .5 = .125

the probability that at least 1 will be a girl is 1 - .125 = .875.

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