There are 39 more teachers in School Q than in School R. After 20% of the teachers left School Q and 50% of teachers left School R, the number of teachers who remained in School Q is four times that of the number of teachers in School R. Find the number of teachers in School Q at first.
|
Q |
R |
Before |
5 u |
2 u |
Change |
- 1 u |
- 1 u |
After |
4 u |
1 u |
20% =
20100 =
15 50% =
50100 =
12Number of more teachers in School Q than in School R
= 5 u - 2 u
= 3 u
3 u = 39
1 u = 39 ÷ 3 = 13
Number of teachers in School Q at first
= 5 u
= 5 x 13
= 65
Answer(s): 65