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April 20, 2014

Homework Help: algebra

Posted by Anonymous on Tuesday, February 19, 2013 at 9:21pm.

a survey of 70 customers was taken at a bookstore regarding the type of books purchased. the survey found that 42 customers purchased mysteries,35 purchased science fiction, 28 purchased romance novels,19 purchased mysteries and sicence fiction, 15 purchased mysteries and romance novels, 11 purchased science fiction and romance novels and 4 purchased all 3 types. how many purchased only romance novels?

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