powpow71
29.12.2019 •
Mathematics
Asurvey of 61 customers was taken at a bookstore regarding the types of books purchased. the survey found that 36 customers purchased mysteries, 30 purchased science fiction, 21 purchased romance novels, 16 purchased mysteries and science fiction, 12 purchased mysteries and romance novels, 9 purchased science fiction and romance novels, and 5 purchased all three types of books. a) how many of the customers surveyed purchased only romance novels? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?
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4.5
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