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If the range of a random variable X is 0...

If the range of a random variable X is `0.1,2,3,4,......` with `P(X=k)=((k+1)/(3^k))` a for `kge 0`, then `a=`

A

`(2)/(3)`

B

`(4)/(9)`

C

`(8)/(27)`

D

`(16)/(81)`

Text Solution

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The correct Answer is:
B
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