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Each child born to a set of parents has a probability of .5 of being male or female.A particular set of parents wishes to have

Each child born to a set of parents has a probability of .5 of being male or female.A particular set of parents wishes to have all boys.Suppose these parents have 5 children.

1a. What is the probability that exactly 2 of them are girls?

1b. What is the probability that 1 or more is a boy?

1c. What is the probability that all 5 children are boys?

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