There were an equal number of boys in Class 4Y and Class 4Z.
35 of the students in Class 4Y are boys and
17 of the students in Class 4Z are girls. Given that there are a total of 20 girls in the two classes, how many students are there in Class 4Z?
Class 4Y |
Class 4Z |
Boys |
Girls |
Boys |
Girls |
3x2 |
2x2 |
6 |
1 |
6 u |
4 u |
6 u |
1 u |
Fraction of boys in Class 4Z
= 1 -
17=
67The number of boys in Class 4Y and Class 4Z is the same. Make the numerators the same.
3x25x2 of students in Class 4Y =
67 of students in Class 4Z
610 of students in Class 4Y =
67 of students in Class 4Z
Total number of girls
= 4 u + 1 u
= 5 u
5 u = 20
1 u = 20 ÷ 5 = 4
Number of students in Class 4Z
= 7 u
= 7 x 4
= 28
Answer(s): 28