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It is found that the mean life of a Luvu Light bulb is 52 hours with a standard deviation of 4.5 hours. Find the probability

It is found that the mean life of a Luvu Light bulb is 52 hours with a standard deviation of

4.5 hours.

Find the probability that a bulb picked at random will have a life of

a. between 52 and 62 hours

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