A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results are below
47 said they drove alone
24 rode in a carpool
35 rode public transportation
3 used both carpools and public transportation
4 used both a carpool and sometimes their own cars
6 used buses as well as their own cars
1 used all three methods
How many students are using all three (Region VII)?
___________students