Discrete Mathematics with Applications 4th Edition

Published by Cengage Learning
ISBN 10: 0-49539-132-8
ISBN 13: 978-0-49539-132-6

Chapter 9 - Counting and Probability - Exercise Set 9.2 - Page 536: 1

Answer

$5$ ways.

Work Step by Step

Since the series is over as soon as a team wins 4 games, the series continues from here until team A wins another game. Basically, team A can either win game 4, game 5, game 6, game 7, or not win another game, for a total of 5 games.
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