Life of a certain electronic components, X, follows exponential model with mean life of 11 hours....

Life of a certain electronic components, X, follows exponential model with mean life of 11 hours.

Find the ‘half-life’ of such components, i.e. find ‘b’ such that P[X>=b]=1/2.
If W=X₁+X₂+X₃, how can we find P[W<=30]?

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orchestra answered 2 years ago

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