Answer
a. 0.807
b. 0.194
Work Step by Step
Here P = 0.72
a. P(At least one doesn't use computer) = $1 - (0.72)^{5} = 0.807$
b. P(None use computer) = $(0.72)^{5} = 0.194$
Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition
by Bluman, Allan
Published by
McGraw-Hill Education
ISBN 10:
0078136334
ISBN 13:
978-0-07813-633-7
Chapter 4 - Probability and Counting Rules - 4-3 The Multiplication Rules and Conditional Probability - Exercises 4-3 - Page 223: 8
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