Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 11 - Counting Methods and Probability Theory - 11.3 Combinations - Exercise Set 11.3: 3

Answer

This problem does involve permutations.

Work Step by Step

This problem does involve permutations. After all, we are trying to find the number of different passwords that we can make given the letters that we have, and the order of the letters does make a difference.
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