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If the probability mass function of a di...

If the probability mass function of a discrete random variable X is
`P(x)=C/(x^3), x=1,2,3`
=0, otherwise
Then `E(X)=`

A

(a) `343/297`

B

(b) `294/251`

C

(c) `297/294`

D

(d) `251/294`

Text Solution

Verified by Experts

The correct Answer is:
B
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