Question: Suppose that the average time before breakdown is normally distributed with a mean of 2.5 weeks and a standard deviation of 0.8 weeks. If breakdowns

Suppose that the average time before breakdown is normally distributed with a mean of 2.5 weeks and a standard deviation of 0.8 weeks. If breakdowns cost an average of $8,000 and preventive maintenance costs $2,000, what is the optimal maintenance interval? (Select the nearest number)

Select one:

a. 2.29 weeks

b. 2.83 weeks

c. 2.95 weeks

d. 1.83 weeks

e. 2.08 weeks

f. 2.40 weeks

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