Elementary Statistics: Picturing the World (6th Edition)

Published by Pearson
ISBN 10: 0-32191-121-0
ISBN 13: 978-0-32191-121-6

Chapter 3 - Probability - Section 3.4 Additional Topics in Probability and Counting - Exercises - Page 174: 18

Answer

Permutation. The order of the letters are important.

Work Step by Step

We need to use permutation because a different order of the letters will lead to different passwords and thus the order is important.
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