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? Th

Algebra ->  Probability-and-statistics -> 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? Th      Log On


   



Question 1126990: 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? The probability that at least one will be a girl is _____%
Answer by Boreal(15235) About Me  (Show Source):
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probability none is a girl is (1/2)^3=1/8
so probability at least one is a girl is 7/8 or 87.5%