Answer
$A\cup B\cup C=\{2, 3, 5, 7, 11, 13, 17, 1, 4, 9, 16,8,14,20\}$
Work Step by Step
The union of sets is the set of elements that are in at least one of the sets. Hence here $A\cup B\cup C=\{2, 3, 5, 7, 11, 13, 17, 1, 4, 9, 16,8,14,20\}$
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 - Extension - Apply Set Theory - Practice - Page 716: 5
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