A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results are below. How many are not using any of the three?
38 said they drove alone.
34 rode in a carpool.
33 rode public transportation.
9 used both carpools and public transportation.
6 used both a carpool and sometimes their own cars.
9 used buses as well as their own cars.
4 used all three methods.
_____students
To find out how many students are not using any of the three methods, we need to subtract the number of students who used at least one method from the total number of students.
Total number of students = 100
Students who used at least one method:
- 38 drove alone
- 34 rode in a carpool
- 33 rode public transportation
Students who used two methods:
- 9 used both carpools and public transportation
- 6 used both a carpool and sometimes their own cars
- 9 used buses as well as their own cars
Students who used all three methods:
- 4 used all three methods
To calculate the number of students who are not using any of the three methods, we need to add up the number of students who used two methods, those who used all three methods, and subtract this total from the total number of students.
Students using two methods = 9 + 6 + 9 = 24
Students using all three methods = 4
Number of students not using any of the three methods = Total number of students - Students using at least one method - Students using two methods - Students using all three methods
Number of students not using any of the three methods = 100 - (38 + 34 + 33) - 24 - 4
Number of students not using any of the three methods = 100 - 105 - 24 - 4
Number of students not using any of the three methods = -33
Since we can't have a negative number of students, it seems there might be an error in how the data is presented or collected. Please verify the numbers and information given.