Answer
$P(3~or~4)=0.552$
Work Step by Step
Using the Addition Rule for Disjoint Events (Page 270):
$P(3~or~4)=P(3)+P(4)=0.322+0.230=0.552$
Statistics: Informed Decisions Using Data (4th Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0321757270
ISBN 13:
978-0-32175-727-2
Chapter 6 - Section 6.1 - Assess Your Understanding - Applying the Concepts - Page 330: 18f
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