There are 33 more teachers in School R than in School S. After 20% of the teachers left School R and 50% of teachers left School S, the number of teachers who remained in School R is four times that of the number of teachers in School S. Find the number of teachers in School R at first.
|
R |
S |
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 R than in School S
= 5 u - 2 u
= 3 u
3 u = 33
1 u = 33 ÷ 3 = 11
Number of teachers in School R at first
= 5 u
= 5 x 11
= 55
Answer(s): 55