Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 11 - Counting Methods and Probability Theory - Chapter Summary, Review, and Test - Review Exercises: 74

Answer

3/5 or 0.6

Work Step by Step

The question asks you to find the probability that a randomly selected student in the survey is from a middle income family or a high income family. These events are mutually exclusive because it is impossible for A and B to occur simultaneously. P(middle income family or high income family)= P(middle income family)+(high income family) P(middle income family or high income family)= 160/350 + 50/350 P(middle income family or high income family)= 3/5 or 0.6
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