Question

5 out of 7 students in my class are car riders, the rest are bus riders. If 12 students in my class are bus riders, how students are there IN ALL?

9, 7, 21, 4​

Answer 1

42 students

Explanation:

5 out of 7 students are car riders. This means 2 out of 7 students are bus riders. 12 students are bus riders.

12 = 2x/7, where x is the total number of students.

So, 84 = 2x

This means that x = 42. 2/7 of 42 is 12 so this is correct.