UGC-NET | UGC NET CS 2018 July – II | Question 53

In a multi-user operating system, 30 requests are made to use a particular resource per hour, on an average. The probability that no requests are made in 40 minutes, when arrival pattern is a poisson distribution, is _________.
(A) e-15
(B) 1 – e-15
(C) 1 – e-20
(D) e-20

Answer: (D)


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