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