Question: The mean time between failure (MTBF) of five subsystems connected as shown in the figure below are: Subsystem A B C D E F MTBF

The mean time between failure (MTBF) of five subsystems connected as shown in the figure below are: Subsystem A B C D E F

MTBF (hours) 2,000 4,000 2,000 3,000 2,000 4,000 If the failure rate of each subsystem is constant under normal operating conditions,

(i) determine the MTBF of the system.

(ii) determine the probability that the system will be operating after 1000 hours.

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