Using the principles of a Venn Diagram, the number of people in this party who are not students and do not have a car is c. 25.
The total number of students in the party = 35
The number of students with cars = 20
The number of students without cars = 15 (35 - 20)
The number of people with cars = 30
The number of non-students with cars = 10 (30 - 2)
The total number of non-students in the party = 35
The number of non-students without cars = 25 (35 - 10)
Table
With Cars Without Cars Total
Students 20 15 35
Non-Students 10 25 35
Total 30 40 70
Thus, we can conclude that 25 non-students came to the party without cars