Solution-The life of a semiconductor laser at a constant

The life of a semiconductor laser at a constant power is normally distributed with a mean of 7000 hours and a standard deviation of 600 hours.

(a) What is the probability that a laser fails before 5,800 hours?

(b) What is the life in hours that 90% of the lasers exceed?

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The life of a semiconductor laser at a constant power is : the life of a semiconductor laser at a constant power is normally distributed with a mean of 7000 hours and a standard

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