There are 18 more teachers in School X than in School Y. After 25% of the teachers left School X and 50% of teachers left School Y, the number of teachers who remained in School X is thrice that of the number of teachers in School Y. Find the number of teachers in School X at first.
|
X |
Y |
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 X than in School Y
= 4 u - 2 u
= 2 u
2 u = 18
1 u = 18 ÷ 2 = 9
Number of teachers in School X at first
= 4 u
= 4 x 9
= 36
Answer(s): 36