Essentials of Statistics (5th Edition)

by Triola, Mario F.

Published by Pearson

ISBN 10: 0-32192-459-2

ISBN 13: 978-0-32192-459-9

Chapter 4 - Probability - 4-5 Multiplication Rule: Complements and Conditional Probability - Page 174: 30

Answer

$0.99998775$

Work Step by Step

Because the failings are independent, we can use the multiplication rule: P(at least one doesn't fail):1-P(both fail) =$1-0.0035^{2}=0.99998775$

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