### Home > CCG > Chapter 3 > Lesson 3.2.1 > Problem 3-56

When you list *all* of the possible outcomes in a sample space by following an organized system (an orderly process), it is called a systematic list. There are different strategies that may help you make a systematic list, but what is most important is that you methodically follow your system until it is complete.

To get home, Renae can take one of four buses:

Create the sample space of all the possible ways Renae can get home and do one activity by making a systematic list.

Write the possibilities in an organized way so that you don't skip any.

Bus

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BusLetter

BusBook Use your sample space to find the following probabilities:

Find the numerator by counting from your systematic list.

P(Renae takes an odd-numbered bus)

P(Renae does not write a letter)

P(Renae catches the #

bus and then reads a book)

Does her activity depend on which bus she takes? Explain why or why not.

Look at your list. Do the possible activities change depending on which bus she takes?