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The time between failures for an electronic component is distributed with an average of 50 hours...

The time between failures for an electronic component is distributed with an average of 50 hours between consecutive failures. If a component is installed as a backup "backup". What is the probability that at least one of the two components will work 60 hours or more?

a. 0.51

b. 0.09

c. 0.06

d. 0.70

math   Statistics-And-Probability   
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