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Mathematics, 23.02.2021 01:30 AquaTyrant5054

A submarine has three navigational devices but can remain at sea if at least two are working. Suppose that the failure times are exponential with means 1 year, 1.5 years, and 3 years. What is the average length of time the submarine can remain at sea?

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A submarine has three navigational devices but can remain at sea if at least two are working. Suppos...

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