Discrete Mathematics with Applications 4th Edition

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

Chapter 10 - Graphs and Trees - Exercise Set 10.1 - Page 640: 15

Answer

the number of edges is 8

Work Step by Step

The total degree of the graph is 0 + 2 + 2 + 3 + 9 = 16, so by Theorem 10.1.1, the number of edges is 16/2 = 8.
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