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The Smith family was one of the first to come to the U.S. They had 4 children. Assuming that the probability of a child being

The Smith family was one of the first to come to the U.S. They had 4 children. Assuming that the probability of a child being a girl is .5, find the probability that the Smith family had:

at least 3 girls?

at most 2 girls?

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