In mathematics, random variables are used in the study of probability. They were developed to assist in the analysis of games of chance by capturing only the mathematical properties necessary to answer probabilistic questions.

There are two types of random variables — discrete and continuous. A discrete random variable takes values from a countable set of specific values, each with some probability greater than zero. A continuous random variable takes values from an uncountable set, and the probability of any one value is zero, but a set of values can have positive probability. Random variables can also be "mixed", having attributes of both discrete and continuous random variables.

Dim lights Embed Embed this video on your site