Answer
(a) 0.95
Work Step by Step
The sample space: 100 DVRs.
Event A: the DVR is defective. There are 5 defective DVRs.
$P(defective)=\frac{5}{100}=0.05$
Event A': the DVR is not defective.
$P(not~defective)=1-P(defective)=1-0.05=0.95$
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 140: 14
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