The operating time of a system is 24 hours per day, Monday through Saturday. Failure of the system occurs as follows. Monday: No failure Tuesday: 5A. M. to 7 A. M. Wednesday: No failure Thursday: 4 P.M. to 8 P.M. Friday: 8 A. M. to 11 A. M. Saturday: No failure What is the MTBF of the system?

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A. 3 hours

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B. 8 hours

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C. 45 hours

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D. 56 hours

The operating time of a system is 24 hours per day, Monday through Saturday. Failure of the system occurs as follows. Monday: No failure Tuesday: 5A. M. to 7 A. M. Wednesday: No failure Thursday: 4…

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