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I am trying to figure out a question in the textbook Statistics for Management and Economics - question 7.146. Question says Survey revealed 15% of

I am trying to figure out a question in the textbook Statistics for Management and Economics - question 7.146. Question says Survey revealed 15% of American adults have used an online dating services. Suppose a statistician randomly selected 20 American adults. first part of the question is "What is the probability that exactly 3 used an online dating service?" How do i solve this?

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