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 9.1 - Page 523: 2

Answer

3/4; 1/2; 1/2

Work Step by Step

The four possible outcomes are HH, HT, TH, TT. Since there are three instances where at least one H occurs and all four outcomes are equally likely, the probability is 3/4. Similarly, the probability that coin A is H is 1/2 and the probability of either HH or TT is 1/2.
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