Answer
$0.99998775$
Work Step by Step
We can use the multiplication rule: P(at least one doesn't fail):1-P(both fail) =$1-0.0035^{2}=0.99998775$
Elementary Statistics (12th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0321836960
ISBN 13:
978-0-32183-696-0
Chapter 4 - Probability - 4-5 Multiplication Rule: Complements and Conditional Probability - Basic Skills and Concepts - Page 174: 30
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