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If random variable X has the following p...

If random variable X has the following probability distribution. Then the value of a is

A

`7/(81)`

B

`5/(81)`

C

`2/(81)`

D

`1/(81)`

Text Solution

Verified by Experts

The correct Answer is:
D
The given distribution is the probabillitu distribution
`therefore" "sum_(r=0)^8P(X=r)=1`
`rArr" "a+3a+5a+7a+9a+11a+15a+17a=1`
`rArr" "a=1/(81)`
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