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The p.m.f. of a r.v. X is P(x)={{:(kx^(2...

The p.m.f. of a r.v. X is `P(x)={{:(kx^(2)","x=1","2","3","4),(0", otherwise"):}`, then E (X) =

A

`7/3`

B

`5/3`

C

`10/3`

D

`8/3`

Text Solution

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The correct Answer is:
C
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