Learn the basics of tree diagram probability with the help of our examples and templates that we have collected in the following images below. Just click on the image to get the diagrams and we’ll start by giving you the first example of tree diagram probability below.

Tree diagrams allow us to see all the possible outcomes of an event and calculate their probability. Each branch in a tree diagram represents a possible outcome. We can construct a probability tree diagram to help us solve some probability problems. A tree diagram probability shows all the possible events. The first event is represented by a dot. From the dot, branches are drawn to represent all possible outcomes of the event.


The probability of each outcome is written on its branch. Also note that in a tree diagram to find a probability of an outcome we multiply along the branches and add vertically. If two events are independent, the outcome of one has no effect on the outcome of the other. Drawing a probability tree (or tree diagram) is a way for you to visually see all of the possible choices, and to avoid making mathematical errors.


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