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Please solve the question with explaination l, (a) The time in days between breakdowns of a machine is exponentially distributed with A = 0.4. {i}

Please solve the question with explaination
l, (a) The time in days between breakdowns of a machine is exponentially distributed with A = 0.4. {i} What is the probability that after the machine is repaired it lasts at least a week before failing again? (ii) What is the probability that at least two machines will run two more days before breaking down

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