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A survey of 63 customers was taken at a bookstore regarding the types of books purchased. The survey found that 37 customers purchased mysteries, 30

A survey of 63 customers was taken at a bookstore regarding the types of books purchased. The survey found that 37 customers purchased mysteries, 30 purchased science fiction, 24 purchased

romance novels, 16 purchased mysteries and science fiction, 13 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 mysteries?

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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