Algebra and Trigonometry 10th Edition

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

Chapter 11824 - 11.6 - Counting Principles - 11.6 Exercises - Page 824: 48

Answer

See below.

Work Step by Step

The possibilities are: $ABCD,ACBD,DBCA,DCBA$, thus we have $4$ possibilities.
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