Elementary Statistics: Picturing the World (6th Edition)

Published by Pearson
ISBN 10: 0-32191-121-0
ISBN 13: 978-0-32191-121-6

Chapter 3 - Probability - Section 3.1 Basic Concepts of Probability and Counting - Exercises - Page 140: 14

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. $P(not~defective)=1-P(defective)=1-0.05=0.95$
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