Make a Venn diagram. All the data can be nicely entered.
Once done, all your answers can be determined from that.
A survey of 63 customers was taken at a bookstore regarding the types of books purchased. The survey found that 39 customers purchased mysteries, 29 purchased science fiction, 23 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.
How many customers purchased only Science Fiction?
How many customers purchased only Romance?
How many customers purchased only Mysteries?
How many customers purchased both Science Fiction and Romance?
How many customers purchased both Science Fiction and Mysteries?
How many customers purchased both Romance and Mysteries?
How many customers purchased all three types?
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