Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 11 - Counting Methods and Probability Theory - 11.6 Events Involving Not and Or; Odds - Exercise Set 11.6 - Page 734: 15



Work Step by Step

The total number of people in this sample: $3000$, the number of people in this sample with an age under $65$: $3000-180=2820$, thus the probability: $\frac{2820}{3000}=\frac{47}{50}$
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