is written alongside the line. In mathematics, the tree diagram is used in probability and statistics and it allows us to calculate the number of possible outcomes of an event where those outcomes are listed in an organised manner. A tree diagram is used in mathematics – more specifically, in probability theory – as a tool to help calculate and provide a visual representation of probabilities. Generally, it is used mostly for dependent events, but we can also use it for independent ones. The outcome of a certain event can be found at the end of each branch in the tree diagram. They get their name because these types of diagrams resemble the shape of a tree. Tree diagrams are a way of showing combinations of two or more events. Tree Diagram … A tree diagram is a way of describing all the possible outcomes from a series of events A tree diagram is a way of calculating the probability of all the possible outcomes from a … The branches of a tree split off from one another, which then in turn have smaller branches. Figure 1. Tree diagrams. Each path of the branches in the tree diagram represents one outcome of an event. Tree diagrams are a helpful tool for calculating probabilities when there are several independent events involved. Constructing probability tree diagram is one of the ways that helps us solve probability problems. Each branch is labelled at the end with its outcome and the probability. Tree diagrams are useful for organizing and visualizing all possible events and their outcomes, since seeing a graph representation of our problem often helps us see it more clearly.