There was an equal number of boys and girls at the canteen. After
35 of the boys and 52 girls left the canteen, there were 19 more boys than girls at the canteen. How many students were there at the canteen at first?
| |
Boys |
Girls |
| Before |
5 u |
5 u |
| Change |
- 3 u |
- 52 |
| After |
2 u |
5 u - 52 |
Number of boys in the end
= 5 u - 3 u
= 2 u
If another 19 girls entered the canteen, the number of boys and girls would be the same.
5 u - 52 + 19 = 2 u
5 u - 33 = 2 u
5 u - 2 u = 33
3 u = 33
1 u = 33 ÷ 3 = 11
Number of students in the canteen at first
= 10 u
= 10 x 11
= 110
Answer(s): 110
