Hk Dass poisson distribution

Question

If x has a modified Poisson distribution

$P_k = P_r(x = k) =$$\Large \frac{ ( e^m - 1 )^{-1} m^k}{k!}$, $(k = 1,2,3.....)$, then expected value of x is .......

Comments

k in numerator canceled $k!$

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ohh formula

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@Mk utkarsh, isnt it e^m/(m* (e^m - 1) 'm' is in denominator right?