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 154: 15



Work Step by Step

We know that $P(D)+P(\overline{D})=1.$ Therefore the probability of randomly choosing someone who does not prefer a direct-in-person encounter is: $P(\overline{D})=1-P(D)=1-0.550=0.450$
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