There are 40 more teachers in School S than in School T. After 30% of the teachers left School S and 50% of teachers left School T, the number of teachers who remained in School S is seven times that of the number of teachers in School T. Find the number of teachers in School S at first.
|
S |
T |
Before |
10 u |
2 u |
Change |
- 3 u |
- 1 u |
After |
7 u |
1 u |
30% =
30100 =
310 50% =
50100 =
32Number of more teachers in School S than in School T
= 10 u - 2 u
= 8 u
8 u = 40
1 u = 40 ÷ 8 = 5
Number of teachers in School S at first
= 10 u
= 10 x 5
= 50
Answer(s): 50