The range of a random variable x is \[\{1,2,3,...\}.\] If \[P(x=r)=\frac{1}{{{2}^{r}}}\], then the mean of the distribution is

The range of a random variable x is \[\{1,2,3,...\}.\] If \[P(x=r)=\fr

1.	The range of a random variable x is \[\{1,2,3,...\}.\] If \[P(x=r)=\frac{1}{{{2}^{r}}}\], then the mean of the distribution is
A.	8
B.	16
C.	1
D.	2
Answer» E.

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The range of a random variable x is \[\{1,2,3,...\}.\] If \[P(x=r)=\frac{1}{{{2}^{r}}}\], then the mean of the distribution is

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