PSLE Pupils in a school are put into two groups for an excursion.
27 of the pupils are in Group A and the rest in Group B.
14 of the pupils in Group A are girls. In the school,
12 of the pupils are girls. What fraction of the pupils in Group B are boys?
Group A |
Group B |
Total |
2x2 |
5x2 |
7x2 |
|
|
2x7 |
4 u |
10 u |
14 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
1 |
3 |
|
|
1x7 |
1x7 |
1 u |
3 u |
6 u |
4 u |
7 u |
7 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 7 and 2 is 14.
Number of girls in Group B
= 7 u - 1 u
= 6 u
Number of boys in Group B
= 10 u - 6 u
= 4 u
Fraction of the pupils in Group B that are boys
=
410=
25Answer(s):
25