There were an equal number of boys in Class 6R and Class 6S.
35 of the students in Class 6R are boys and
17 of the students in Class 6S are girls. Given that there are a total of 15 girls in the two classes, how many students are there in Class 6S?
Class 6R |
Class 6S |
Boys |
Girls |
Boys |
Girls |
3x2 |
2x2 |
6 |
1 |
6 u |
4 u |
6 u |
1 u |
Fraction of boys in Class 6S
= 1 -
17=
67The number of boys in Class 6R and Class 6S is the same. Make the numerators the same.
3x25x2 of students in Class 6R =
67 of students in Class 6S
610 of students in Class 6R =
67 of students in Class 6S
Total number of girls
= 4 u + 1 u
= 5 u
5 u = 15
1 u = 15 ÷ 5 = 3
Number of students in Class 6S
= 7 u
= 7 x 3
= 21
Answer(s): 21