Answer
(a) $125,000$
(b) Such a lock should be described as a permutation lock.
Work Step by Step
(a) We have 3 choices, each choice has 50 numbers, thus the total is $50^3=125,000$
(b) Such a lock should be described as a permutation lock.
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 12 - Counting and Probability - Section 12.2 Permutations and Combinations - 12.2 Assess Your Understanding - Page 876: 63
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