how to find pmf of $y what a y-y is the pdf of can you find pmf on sql? how to find pmf value of $y how to compute e[y]$ without finding the marginal distribution how to find the pmf value of y in math how to find pmf of $y how to find the marginal distribution of $e[y]$? what is the marginal distribution of $y how to find pmf of $y what is an e(y)$ in math how to find pmf for $y how to find marginal f of $y how to find pmf of $y what is the x and y in math what is the pmf of y? calculate marginal pmf of the y variable how to calculate e of $y if ysim geometric(p)$, how to find $e[y]$ how to find pmf of $y in algebra