6.15 A bookstore sells two types of books (fiction and nonfiction) in several formats (hardcover, paperback, digital, and audio). For the chance experiment that consists of observing the type and format of a singlebook purchase, two of the eight possible outcomes are a hardcover fiction book and an audio nonfiction book.

a. There are eight outcomes in the sample space for this experiment. List these possible outcomes.

b. Do you think it is reasonable to think that the outcomes for this experiment would be equally likely? Explain.

c. For customers who purchase a single book, the estimated probabilities for the different possible outcomes are given in the cells of the accompanying table. What is the probability that a randomly selected single-book purchase will be for a book in print format (hardcover or paperback)?

Hardcover Paperback Digital Audio Fiction .15 .45 .10 .10 Nonfiction .08 .04 .02 .06

d. Show two different ways to compute the probability that a randomly selected single-book purchase will be for a book that is not in a print format.

(Hint: See Example 6.9.)

e. Find the probability that a randomly selected singlebook purchase will be for a work of fiction.