There was an equal number of girls and boys in the school hall. When 25% of the boys left the school hall, there were 10 more girls than boys remaining in the school hall. How many children remained in the school hall?
|
|
Girls
|
Boys
|
|
Before
|
4 u
|
4 u
|
|
Change
|
|
- 1 u
|
|
After
|
4 u
|
3 u
|
25% =
25100 =
14Number of boys in the end
= 4 u - 1 u
= 3 u
Number of more girls than boys remaining in the school hall
= 4 u - 3 u
= 1 u
1 u = 10
Total number of students remaining in the school hall
= 4 u + 3 u
= 7 u
= 7 x 10
= 70
Answer(s): 70
