Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 11 - 11.7 - Probability - 11.7 Exercises - Page 837: 67d

Answer

The options are mutually exclusive.

Work Step by Step

In a group, either two people have the same birthday, or they do not. Thus, the options are mutually exclusive, so if we do 1 minus the chances of no two people having the same birthday, we get the probability of two people having the same birthday.
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