The method of drawing a tree diagram is the same as the list method, but it is presented in two forms, involving at least two main factors. These two methods are based on the study of the simplest enumeration method, and their complexity is more complicated than that of the simple enumeration method, so every possibility should be listed, but the expression is different.
Drawing a tree diagram to find probability can cultivate the order of everyone's thinking, improve students' ability to analyze and solve problems, and make students' thinking more agile through the tree diagram method.