Question: Time that is needed to fix a car engine problem follows a normal distribution with mean of 48 and std of 5 minutes .A mechanics

Time that is needed to fix a car engine problem follows a normal distribution with mean of 48 and std of 5 minutes .A mechanics tells a customer that it takes maximum of 1 hour to fix the engine .

a.what is the probability that the mechanics estimation about the time does not happen.

b.if the mechanic wants to give an estimation about time with 98% confidence what would be the time

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