During a class conference,
910 of the students were girls and the rest were boys. Halfway, 860 more boys joined in the conference and there were
25 as many girls as boys. Find the number of students at the class conference in the end.
|
Girls |
Boys |
Before |
9x2 = 18 u |
1x2 = 2 u |
|
|
+ 860 |
After |
2x9 = 18 u |
5x9 = 45 u |
The number of boys remains unchanged.
LCM of 2 and 9 = 18.
Number of more boys who joined in
= 45 u - 2 u
= 43 u
43 u = 860
1 u = 860 ÷ 43 = 20
Number of students in the end
= 18 u + 45 u
= 63 u
= 63 x 20
= 1260
Answer(s): 1260