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In: Statistics and Probability

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.

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

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