Answer:
#_cars = 7
Explanation:
For this exercise let's start by finding the total number of students
#_students = 12 +15
#_students = 27
Now we can use a direct proportion relationship or rule of three. If 4 students drive, how many cars for 27 students?
#_cars = 27 (¼)
#_cars = 6.75
the number of cars must be an integer therefore the correct answer is
#_cars = 7
