Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 12 - Counting and Probability - Chapter Review - Review Exercises - Page 888: 6



Work Step by Step

A and C, or in mathematical notation $A\cap C$, means the set of all elements that are in both sets A and C. Using the diagram, we have: $n(A\cap C)=1+6=7$
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