1. The problem statement, all variables and given/known data a) Let X1, X2, ...XN be a collection of independent Bernoulli random variables. What is the distribution of Y = [itex]\sum[/itex]Ni = 1 Xi b) Show E(Y) = np 2. Relevant equations Bernoulli equations f(x) = px(1-p)1-x 3. The attempt at a solution a)X1 + X2 + .... + XN = p b) Not sure. I'm assuming the expectation would mean when each probability is multiplied by "x", the x's go from 0 to n, meaning they represent the n.