Question: Problem 7. (6 pts) A circuit has three independent components with exponential distribution of mean lifetime 71 = 20, 72 = 30 and 73 =

Problem 7. (6 pts) A circuit has three independent components with exponential distribution of mean lifetime 71 = 20, 72 = 30 and 73 = 60 months. The circuit is working as long as all three components are working. Find the expected lifetime of the circuit

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