PSLE Pupils in a school are put into two groups for an excursion.
12 of the pupils are in Group A and the rest in Group B.
49 of the pupils in Group A are boys. In the school,
59 of the pupils are boys. What fraction of the pupils in Group B are boys?
Group A |
Group B |
Total |
1x9 |
1x9 |
2x9 |
|
|
9x2 |
9 u |
9 u |
18 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
4 |
5 |
|
|
5x2 |
4x2 |
4 u |
5 u |
6 u |
3 u |
10 u |
8 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 2 and 9 is 18.
Number of boys in Group B
= 10 u - 4 u
= 6 u
Fraction of the pupils in Group B that are boys
=
69=
23Answer(s):
23