Find the Probability generating function of the discrete random variable X with probability mass function

P(X=k)= (2/3)x(1/3)^k-1 for k=1,2...

Hence find the mean of X?

Can anybody help with this question?

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- April 21st 2013, 07:14 AMwrexlive1Probability Generating Function
Find the Probability generating function of the discrete random variable X with probability mass function

P(X=k)= (2/3)x(1/3)^k-1 for k=1,2...

Hence find the mean of X?

Can anybody help with this question? - April 21st 2013, 10:10 AMjohngRe: Probability Generating Function
Hi,

Here's a solution. I hope you understand:

Attachment 28065