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
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
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