Answer
See below.
Work Step by Step
According to the graph the probabilities are:
a) $0.78$
b) P(not E)=1-P(E), thus here the probability is: $1-0.78=0.22$
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 734: 12
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