Answer
$0.9936$
Work Step by Step
Complement of P(A) is that none of the calculators work. We have 2 calculators, so: $P(at \ least \ one \ works)=1-P(\overline{A})=1-(1-0.92)^{2}=1-(0.08)^{2}=0.9936$
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 172: 10
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