Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

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 875: 47


$132,860$ ways

Work Step by Step

The birthday of the first person can be any day from the $365$ days. Since the birthdays should be different, the second person's birthday can only be a day from the remaining $364$ days (Birthday of first person is excluded from the options that second person can have). Using multiplication principle, we have Number of ways = $365\times364 = 132,860$.
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