Random variable. Probability mass function. Discrete distributions: Bernoulli, binomial, Poisson, geometric, situations in which these distributions arise. Expectation: mean and variance. Probability generating functions, use in calculating expectations. Bivariate discrete distribution, conditional and marginal distributions. Extensions to many random variables. Independence for discrete random variables. Random walks (finite state space only). Solution of quadratic difference equations with applications to random walks.

**Source: **Algebra to Go - A Mathematics Handbook Great Source Education Group - A Houghton Mifflin Company