During a class conference,
910 of the pupils were girls and the rest were boys. Halfway, 885 more boys joined in the conference and there were
47 as many girls as boys. Find the number of pupils at the class conference in the end.
|
Girls |
Boys |
Before |
9x4 = 36 u |
1x4 = 4 u |
|
|
+ 885 |
After |
4x9 = 36 u |
7x9 = 63 u |
The number of boys remains unchanged.
LCM of 4 and 9 = 36.
Number of more boys who joined in
= 63 u - 4 u
= 59 u
59 u = 885
1 u = 885 ÷ 59 = 15
Number of pupils in the end
= 36 u + 63 u
= 99 u
= 99 x 15
= 1485
Answer(s): 1485