During a class function,
57 of the pupils were boys and the rest were girls. Halfway, 272 more girls joined in the function and there were
38 as many boys as girls. Find the number of pupils at the class function in the end.
|
Boys |
Girls |
Before |
5x3 = 15 u |
2x3 = 6 u |
|
|
+ 272 |
After |
3x5 = 15 u |
8x5 = 40 u |
The number of girls remains unchanged.
LCM of 3 and 5 = 15.
Number of more girls who joined in
= 40 u - 6 u
= 34 u
34 u = 272
1 u = 272 ÷ 34 = 8
Number of pupils in the end
= 15 u + 40 u
= 55 u
= 55 x 8
= 440
Answer(s): 440