There are 8 more teachers in School C than in School D. After 30% of the teachers left School C and 50% of teachers left School D, the number of teachers who remained in School C is seven times that of the number of teachers in School D. Find the number of teachers in School C at first.
|
C |
D |
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 C than in School D
= 10 u - 2 u
= 8 u
8 u = 8
1 u = 8 ÷ 8 = 1
Number of teachers in School C at first
= 10 u
= 10 x 1
= 10
Answer(s): 10