Elementary Statistics: Picturing the World (6th Edition)

by Larson, Ron; Farber, Betsy

Published by Pearson

ISBN 10: 0321911210

ISBN 13: 978-0-32191-121-6

Chapter 3 - Probability - Section 3.1 Basic Concepts of Probability and Counting - Exercises - Page 142: 37

Answer

$\frac{4.2}{137.3}$=0.0306

Work Step by Step

The probability that a voter chosen is in 18 to 20 years old =\frac{Frequency corresponding to 18 to 20 age }{Total freqency} =\frac{4.2 millions }{137.3 millions } = 0.0306

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