A system consists of five identical components connected in series as shown:
As soon as one component fails, the entire system will fail. Suppose each component has a lifetime that is exponentially distributed with λ = .01 and that components fail independently of one another. Define events Ai = {ith component lasts at least t hours},i= 1,……5 , so that the Ai are independent events. Let X = the time at which the system fails—that is, the shortest (minimum) lifetime among the five components.
a. The event { } is equivalent to what event involving ?
b. Using the independence of the Ai’s , compute P(X≥t) . Then obtain F(t) = P(X ≤t)and the pdf of X. What type of distribution does X have?
c. Suppose there are n components, each having exponential lifetime with parameter . What type of distribution does X have?
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