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(Solved): Machine 1 is currently working. Machine 2 will be put in use at a time t from now. If the lifetime o ...
Machine 1 is currently working. Machine 2 will be put in use at a time t from
now. If the lifetime of machine i is exponential with rate \lambda _(i),i=1,2, what is
the probability that machine 1 is the first machine to fail?