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7. A bookstore classifies its books by reader group, type of book, and cost. What is the probability that a book selected at random

7. A bookstore classifies its books by reader group, type of book, and cost. What is the probability that a book selected at random is a child's book, given that it costs $15? $10 Fiction 120 255 Child Nonfiction 35 60 Fiction 200 110 Adult Nonfiction 75 150

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