There are 40 more teachers in School C than in School D. After 25% of the teachers left School C and 50% of teachers left School D, the number of teachers who remained in School C is thrice that of the number of teachers in School D. Find the number of teachers in School C at first.
|
C |
D |
Before |
4 u |
2 u |
Change |
- 1 u |
- 1 u |
After |
3 u |
1 u |
25% =
25100 =
14 50% =
50100 =
12Number of more teachers in School C than in School D
= 4 u - 2 u
= 2 u
2 u = 40
1 u = 40 ÷ 2 = 20
Number of teachers in School C at first
= 4 u
= 4 x 20
= 80
Answer(s): 80