"ZHANG Yan" <[EMAIL PROTECTED]> wrote in message
b05scv$lmp35$[EMAIL PROTECTED]">news:b05scv$lmp35$[EMAIL PROTECTED]...
> Hi,I need to compute a probability.
>
> Suppose there are three variable, Px, P, M, where Px, P are probability,
and
> M is random variable.Their relationship is as follows:
>
> if M=1, then Px= 1
> if M=2, then Px=P
> if M=3, then Px=P^2
> ...
> if M=m, then Px=P^{m-1}
> ...
> M varies from 1 to infinite.
> And the probability P(M=m) is given, then how should I compute the
> probability Px?
>
> Thanks.
   If i understand the problem correctly, for  given M=m Px=P(M=m). If that
is the case then it has to be:
1 + P + P^2 + P^3 + ... = 1 and that leads to P=0.
> --
> ZHANG Yan
>
>


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