There was an equal number of girls and boys at the tuck shop. After
35 of the girls and 43 boys left the tuck shop, there were 10 more girls than boys at the tuck shop. How many pupils were there at the tuck shop at first?
| |
Girls |
Boys |
| Before |
5 u |
5 u |
| Change |
- 3 u |
- 43 |
| After |
2 u |
5 u - 43 |
Number of girls in the end
= 5 u - 3 u
= 2 u
If another 10 boys entered the tuck shop, the number of girls and boys would be the same.
5 u - 43 + 10 = 2 u
5 u - 33 = 2 u
5 u - 2 u = 33
3 u = 33
1 u = 33 ÷ 3 = 11
Number of pupils in the tuck shop at first
= 10 u
= 10 x 11
= 110
Answer(s): 110
