Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 12 - Data Analysis and Probability - 12-7 Theoretical and Experimental Probability - Practice and Problem-Solving Exercises - Page 773: 38



Work Step by Step

We know that the sum of the odds in favor of event a and against event a should be 100 percent. We also know that the odds in favor of event a are equal to the odds against event a. Since the sum must be 100%, this will only be true when event a will happen 50% of the time. Thus, the probability is: 1/2 = .5
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