There are 30 more teachers in School R than in School S. After 25% of the teachers left School R and 50% of teachers left School S, the number of teachers who remained in School R is thrice that of the number of teachers in School S. Find the number of teachers in School R at first.
|
R |
S |
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 R than in School S
= 4 u - 2 u
= 2 u
2 u = 30
1 u = 30 ÷ 2 = 15
Number of teachers in School R at first
= 4 u
= 4 x 15
= 60
Answer(s): 60