In the case that X is a discrete random variable, with possible values denoted x1,x2,…,xi,…, the cdf of X can be calculated using the third property of pmf's (Equation \re...In the case that X is a discrete random variable, with possible values denoted x1,x2,…,xi,…, the cdf of X can be calculated using the third property of pmf's (Equation ???), since, for a fixed x∈R, if we let the set A contain the possible values of X that are less than or equal to x, i.e., A={xi|xi≤x}, then the cdf of X evaluated at x is given by
