Multiple Choice
The average time before breakdown of a machine is normally distributed and has a mean of 9 weeks and a standard deviation of 1.5 weeks.If breakdown cost averages $1,500 and preventive maintenance costs $500, what is the optimal preventive maintenance interval?
A) 3.8 weeks
B) 8.4 weeks
C) 9.6 weeks
D) 6.9 weeks
E) 7.2 weeks
Correct Answer:
Verified
Correct Answer:
Verified
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