The grade 12 class at a school consists of 63 learners in the ratio of 4boys to 5 girls. Determine the number of girls in the class
well, one group of students has 9 members (4 boys, 5 girls).
How many 9's in 63?
To determine the number of girls in the class, we need to use the given ratio of boys to girls.
The ratio given is 4 boys to 5 girls. This means that for every 4 boys, there are 5 girls in the class.
We can set up a proportion to solve for the number of girls:
4 boys / 5 girls = 63 learners / x girls
To solve this proportion, we cross-multiply:
4x = 5 * 63
4x = 315
Dividing both sides of the equation by 4:
x = 315 / 4
x ≈ 78.75
Since we are dealing with a whole number of learners, we can round down to the nearest whole number. Therefore, there are approximately 78 girls in the class.