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.
Elementary Statistics: Picturing the World (6th Edition)
by Larson, Ron; Farber, Betsy
Published by
Pearson
ISBN 10:
0321911210
ISBN 13:
978-0-32191-121-6
Chapter 3 - Probability - Section 3.4 Additional Topics in Probability and Counting - Exercises - Page 174: 18
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