Venn Diagrams · Try It 4

(a) Fifty percent of the workers at a factory work a second job, 25% have a spouse who also works, 5% work a second job and have a spouse who also works. Draw a Venn diagram showing the relationships. Let W = works a second job and S = spouse also works.
(b) In a bookstore, the probability that the customer buys a novel is 0.6, and the probability that the customer buys a non-fiction book is 0.4. Suppose that the probability that the customer buys both is 0.2.
(a) Draw a Venn diagram representing the situation.
(b) Find the probability that the customer buys either a novel or a non-fiction book.
(c) In the Venn diagram, describe the overlapping area using a complete sentence.
(d) Suppose that some customers buy only compact disks. Draw an oval in your Venn diagram representing this event.

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Introductory Business Statistics 2e · §3.5 Venn Diagrams · Try It 4