Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 11 - 11.6 - Counting Principles - 11.6 Exercises - Page 823: 24b


$4536$ four-digit numbers are possible.

Work Step by Step

First digit: 9 choices Second digit: 9 choices Third digit: 8 choices Fourth digit: 7 choices Using the Fundamental Counting Principle: $9\times9\times8\times7=4536$
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