PSLE Pupils in a school are put into two groups for an excursion.
38 of the pupils are in Group A and the rest in Group B.
29 of the pupils in Group A are girls. In the school,
13 of the pupils are girls. What fraction of the pupils in Group B are boys?
Group A |
Group B |
Total |
3x3 |
5x3 |
8x3 |
|
|
3x8 |
9 u |
15 u |
24 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
2 |
7 |
|
|
1x8 |
2x8 |
2 u |
7 u |
6 u |
9 u |
8 u |
16 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 8 and 3 is 24.
Number of girls in Group B
= 8 u - 2 u
= 6 u
Number of boys in Group B
= 15 u - 6 u
= 9 u
Fraction of the pupils in Group B that are boys
=
915=
35Answer(s):
35