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If the range ot a random vaniabie X is 0...

If the range ot a random vaniabie `X` is `0,1,2,3,` at `P(X=K)=((K+1)/3^k)` a for `k>=0,` then a equals

A

`2/3`

B

`2/9`

C

`8/(27)`

D

`(16)/(81)`

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The correct Answer is:
B
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