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 - Page 226: 48


$0.111$ This event is unlikely to happen.

Work Step by Step

First find the probability of getting no letter x, $p=(\frac{25}{26})^3=0.889$ The probability of getting at least 1 letter x is the complement: $1-0.889=0.111$ This event is unlikely to happen.
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