Precalculus (10th Edition)

by Sullivan, Michael

Published by Pearson

ISBN 10: 0-32197-907-9

ISBN 13: 978-0-32197-907-0

Chapter 13 - Counting and Probability - Chapter Review - Chapter Test - Page 869: 14

Answer

$0.19.$

Work Step by Step

In a probability model the sum of all probabilities equals $1$. Hence $0.03+P(\text{18-20 years old})+0.23+0.29+0.25+0.01=1\\P(\text{18-20 years old})=1-(0.03+0.23+0.29+0.25+0.01)=0.19.$

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