During a class gathering,
910 of the pupils were boys and the rest were girls. Halfway, 28 more girls joined in the gathering and there were
35 as many boys as girls. Find the number of pupils at the class gathering in the end.
|
Boys |
Girls |
Before |
9x1 = 9 u |
1x1 = 1 u |
|
|
+ 28 |
After |
3x3 = 9 u |
5x3 = 15 u |
The number of girls remains unchanged.
LCM of 3 and 9 = 9.
Number of more girls who joined in
= 15 u - 1 u
= 14 u
14 u = 28
1 u = 28 ÷ 14 = 2
Number of pupils in the end
= 9 u + 15 u
= 24 u
= 24 x 2
= 48
Answer(s): 48