A tree diagram in math is a tool that helps calculate the number of possible outcomes of a problem and cites those potential outcomes in an organized way.

Understanding probability is crucial to many industries, such as finance and medical professions. This guide contains information on the AND/OR rules, tree diagrams and sampling without replacement.

Tree diagrams are a way of showing combinations of two or more events. Each branch is labelled at the end with its outcome and the probability is written alongside the line.