Certain device occur according to a poisson process

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The breakdowns of a certain device occur according to a Poisson process with rate λ = 2 per weekday, and according to a Poisson process (independent of the first process) with rate λ = 1.5 per weekend day. Suppose that exactly four breakdowns have occurred (in all) over two consecutive days. What is the probability that both days were weekdays?

Reference no: EM131130857

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