During a class conference,
47 of the pupils were boys and the rest were girls. Halfway, 36 more girls joined in the conference and there were
49 as many boys as girls. Find the number of pupils at the class conference in the end.
|
Boys |
Girls |
Before |
4x1 = 4 u |
3x1 = 3 u |
|
|
+ 36 |
After |
4x1 = 4 u |
9x1 = 9 u |
The number of girls remains unchanged.
LCM of 4 and 4 = 4.
Number of more girls who joined in
= 9 u - 3 u
= 6 u
6 u = 36
1 u = 36 ÷ 6 = 6
Number of pupils in the end
= 4 u + 9 u
= 13 u
= 13 x 6
= 78
Answer(s): 78