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Suppose that the running time for each process in milliseconds is an exponential random variable with parameter λ=1/20. If process P1 arrives immediately ahead of the process P2 in the running state, then the probability that process P2 will have to wait more than 20 milliseconds is _____________ .

A
0.274
B
0.324
C
0.428
D
0.368

How to approach this. even not able to understand the question.

in Operating System by (433 points) | 50 views
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is the answer D?
0

@OneZero Yes! It's right! Can you please explain me the question and the procedure to solve?

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