Mathematics, 07.05.2021 21:30 bthomas78

A bookshelf contains 9 mysteries, 7 biographies, and 4 science fiction books. Two books are selected. The probability of selecting a biography book, then a mystery book (without replacement) is
63/380
The probability of selecting two science fiction books (with replacement) is
:: 63/400
:: 1/25
:: 3/95
#: 21/190

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