(Answered) A fifteen percent of the us population is greater than 65

Statistics

A. Fifteen percent of the U.S. population is greater than 65 years of age. If a sample of 100 persons is chosen, what is the probability that fewer than 10 are more than 65 years old?

B. In a sample of size 100 from the U.S. population, what are the mean and standard deviation of the number in the sample who are more than 65 years old?

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