Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Published by McGraw-Hill Education
ISBN 10: 0078136334
ISBN 13: 978-0-07813-633-7

Chapter 4 - Probability and Counting Rules - 4-3 The Multiplication Rules and Conditional Probability - Exercises 4-3: 18

Answer

0.116

Work Step by Step

Model I accounts for 80% and 10% are defective, hence: P(Model-I is defective) = 0.8 x 0.1 = 0.08 Model II accounts for 20% and 18% are defective, hence: P(Model-I is defective) = 0.2 x 0.18 = 0.036 P(Any of the items is defective) = 0.08 + 0.036 = 0.116
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