PSLE Pupils in a school are put into two groups for an excursion.
13 of the pupils are in Group A and the rest in Group B.
38 of the pupils in Group A are boys. In the school,
58 of the pupils are boys. What fraction of the pupils in Group B are boys?
Group A |
Group B |
Total |
1x8 |
2x8 |
3x8 |
|
|
8x3 |
8 u |
16 u |
24 u |
Boys |
Girls |
Boys |
Girls |
Boys |
Girls |
3 |
5 |
|
|
5x3 |
3x3 |
3 u |
5 u |
12 u |
4 u |
15 u |
9 u |
The total number of students is repeated.
Make the total number of students the same.
LCM of 3 and 8 is 24.
Number of boys in Group B
= 15 u - 3 u
= 12 u
Fraction of the pupils in Group B that are boys
=
1216=
34Answer(s):
34