Answer
$65\%$
Work Step by Step
We know that $P(\text{A or B})=P(A)+P(B)-P(\text{A and B})$.
Hence here: $P(B)=P(\text{A or B})+P(\text{A and B})-P(A)=80\%+20\%-35\%=65\%$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 10 Counting Methods and Probability - Chapter Test - Page 737: 18
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