PSLE Students in a school are put into two groups for an excursion.
23 of the students are in Group A and the rest in Group B.
1516 of the students in Group A are girls. In the school,
78 of the students are girls. What fraction of the students in Group B are boys?
Group A |
Group B |
Total |
2x8 |
1x8 |
3x8 |
|
|
8x3 |
16 u |
8 u |
24 u |
Girls |
Boys |
Girls |
Boys |
Girls |
Boys |
15 |
1 |
|
|
7x3 |
1x3 |
15 u |
1 u |
6 u |
2 u |
21 u |
3 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 girls in Group B
= 21 u - 15 u
= 6 u
Number of boys in Group B
= 8 u - 6 u
= 2 u
Fraction of the students in Group B that are boys
=
28=
14Answer(s):
14