# Computing expected value

Expected Value for a Discrete Random Variable. E(X)=\sum x_i p_i. x_i= value of the i th outcome p_i = probability of the i th outcome. According to this formula. Definition of expected value & calculating by hand and in Excel. Includes video. Find an expected value for a discrete random variable. the formula for computing its expected value is a straightforward implementation of the informal definition given above: the expected value of X is the weighted.