Question: An electrical supply system is subject to failure which causes loss of supply to the consumer. The mean time between such failures is known to

An electrical supply system is subject to failure which causes loss of supply to the consumer. The mean time between such failures is known to be 398 hr and the meantime to repair the failures and restore the supply is known to be 2 hr. What is the average value of the availability of the supply to the consumer over a long period of time?

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