Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 4 - Probability - 4-3 Addition Rule - Basic Skills and Concepts - Page 153: 10



Work Step by Step

Two events are disjoint if they cannot happen at the same time. Here, the result 'false positive' means that the result was incorrect because the person was not a drug user. Therefore a drug-user cannot get 'false positive'. Therefore these events are disjoint.
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