Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

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: 5

Answer

0.002 Very unlikely event

Work Step by Step

Here P = 0.21 $P(4 sales) = (0.21)^{4} = 0.002$ This event is very unlikely to occur as the probability is less than 0.005.
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