Answer
Doesn't make sense
Work Step by Step
Doesn't make sense, because $P(E)+P(\text{not E})=1$, which here is not the case.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
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 737: 100
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