Answer
$0.19$
Work Step by Step
According to the concept of complements, we have:
$P(A)=1-P(\overline{A})$
We apply this concept here:
$P(\text{18-20 years old})=1-P(\text{not 18-20 years old})=1-(0.03+0.23+0.29+0.25+0.01)=1-0.81=0.19$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 12 - Counting and Probability - Chapter Test - Page 889: 14
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