We are given an experiment and want to represent the sample space by making a tree diagram. The sample space of an experiment is the set of all possible outcomes. In this case, the sample space is the result of two stages of choosing a toothbrush.
First Exercise — Electric or Traditional
Second Exercise — Extra Soft, Soft, or Medium
Keep in mind that there are several ways to make a tree diagram. The part that matters most is that the sample space ends up with all of the possible combinations. Let's now draw a tree diagram to represent the situation.
The are a total of 6 possible outcomes of this event.
