What Are the Chances?

Probability is the branch of mathematics that deals with the likelihood that certain outcomes will occur. There are five basic rules, or axioms, that one must understand while studying the fundamentals of probability.

The conditional probability of an event is the probability that an event will occur given that another event has occurred.

Union and intersection are two key concepts in set theory and probability.

The complement of $A$ is the event in which $A$ does not occur.