Algebra 2 (1st Edition)

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: 15



Work Step by Step

$X=\{April,June,September, November\}$ $Z=\{September, November,October,December\}$ Hence $\overline{Z}=\{January,February,March,April,May,June,July,August\}$
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