Question

Solve this question ​

Answer 1

I think the answer is 80

Answer 2

80

Explanation:

Initial ratio:

Teachers to students

1 : 15

Ratio after:

Teachers to students

3 : 40

The number of students did not change, so we can make the students of the initial ratio and the students of the ratio after the same.

1 : 15 = 8 : 120

3 : 40 = 9 : 120

120 units = 1200

1 unit =
`(1200)/(120) =10`

Initial teachers = 8 units =
`8*10=80`