A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results were as follows:

26 said they drove alone.
34 rode in a carpool.
34 rode public transportation.
7 used both carpools and public transportation.
6 used both a carpool and sometimes their own cars.
5 used buses as well as their own cars.
3 used all three methods.
How many used none of the above-mentioned means of transportation?
1 students

To determine the number of students who used none of the mentioned means of transportation, we need to calculate the total number of students who used at least one of the mentioned means of transportation and subtract it from the total number of students.

Let's break down the given information and calculate the number of students who used at least one means of transportation:

Students who drove alone: 26
Students who rode in a carpool: 34
Students who rode public transportation: 34
Students who used both carpool and public transportation: 7
Students who used both carpool and their own cars: 6
Students who used both buses and their own cars: 5
Students who used all three methods: 3

To calculate the total number of students who used at least one means of transportation, we can add up all these categories:

26 + 34 + 34 + 7 + 6 + 5 + 3 = 115

Now, to find the number of students who used none of the mentioned means of transportation, we subtract this total from the total number of students:

Total number of students - Number of students who used at least one means of transportation = Number of students who used none of the mentioned means of transportation

100 - 115 = -15

The result, -15, suggests that there is a discrepancy in the given information. The number of students who used none of the mentioned means of transportation should not be negative. Please double-check the provided data and ensure its accuracy.