The number of boys in the auditorium was
27 that of the girls. There were 205 more girls than boys. After some girls had left the auditorium, the number of boys at the auditorium was twice the number of the remaining girls. How many girls left the auditorium?
|
Girls |
Boys |
Difference |
Before |
7 u |
2 u |
5 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
= 7 u - 2 u
= 5 u
5 u = 205
1 u = 205 ÷ 5 = 41
Number of girls that left
= 7 u - 1 u
= 6 u
= 6 x 41
= 246
Answer(s): 246