The number of boys in the parade square was
25 that of the girls. There were 123 more girls than boys. After some girls had left the parade square, the number of boys at the parade square was twice the number of the remaining girls. How many girls left the parade square?
| |
Girls |
Boys |
Difference |
| Before |
5 u |
2 u |
3 u |
| Change |
- ? |
|
|
| After |
1 u |
2 u |
|
The number of boys at first and in the end remains unchanged.
Number of more girls than boys at first
= 5 u - 2 u
= 3 u
3 u = 123
1 u = 123 ÷ 3 = 41
Number of girls that left
= 5 u - 1 u
= 4 u
= 4 x 41
= 164
Answer(s): 164
