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The p.d.f. of a r.v. X is f(x)={{:(kx","...

The p.d.f. of a r.v. X is `f(x)={{:(kx","0ltxlt2),(0", otherwise"):}`, then k =

A

4

B

2

C

`(1)/(4)`

D

`(1)/(2)`

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The correct Answer is:
D
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