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Suppose r.v. X = waiting time in minutes...

Suppose r.v. X = waiting time in minutes for a bus and its p.d.f. is given by `f(x)={{:((1)/(5)","0lexle5),(0", otherwise"):}`, then probability that waiting time is between 1 and 3 minutes is

A

`(4)/(5)`

B

`(2)/(5)`

C

`(3)/(5)`

D

`(1)/(5)`

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The correct Answer is:
B
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