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DLMD
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DLMD
If 4 books are to be selected randomly from 2 hardback books and 6 paperback books, what is the probability that one of them is a hardback book?


Total number of ways = 8C4 = 70

Number of ways that 1 hardcover is chosen = 2 * 6C3 = 40

probability = 40/70 = 4/7



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