There was an equal number of girls and boys at the tuck shop. After
25 of the girls and 51 boys left the tuck shop, there were 11 more girls than boys at the tuck shop. How many children were there at the tuck shop at first?
| |
Girls |
Boys |
| Before |
5 u |
5 u |
| Change |
- 2 u |
- 51 |
| After |
3 u |
5 u - 51 |
Number of girls in the end
= 5 u - 2 u
= 3 u
If another 11 boys entered the tuck shop, the number of girls and boys would be the same.
5 u - 51 + 11 = 3 u
5 u - 40 = 3 u
5 u - 3 u = 40
2 u = 40
1 u = 40 ÷ 2 = 20
Number of children in the tuck shop at first
= 10 u
= 10 x 20
= 200
Answer(s): 200
