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Let f(x)=c(4/9)^x. Find c such that f represents the pmf of a random variable whose possible...

Let f(x)=c(4/9)^x. Find c such that f represents the pmf of a random variable whose possible values are 1, 2, 3, ... .

A.4/5

B.5/4

C.4/9

The above random variable is:

A.Geom(4/5) random variable

B.Bern(4/9) random variableC

c.Geom(5/9) random variable

Math   Statistics-And-Probability   
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TOPIC:Geometric distribution.

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