# ALGEBRA

posted by
**Monic**
.

A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results are below.

57 said they drove alone.

29 rode in a carpool.

30 rode public transportation.

6 used both carpools and public transportation.

9 used both a carpool and sometimes their own cars.

10 used buses as well as their own cars.

4 used all three methods.

Use the figure to answer the question in the problem.

How many are using all three (Region VII)?

students