There are 120 learners in Grade 8 at Greenview High School. If the ratio of girls
to boys is 3 : 5, how many boys are there in Grade 8
A 75
B 55
C 15
D 8
The ratio of girls to boys is 3:5, which means that for every 3 girls, there are 5 boys.
To find the number of boys, we need to find the number that represents 5 parts of the ratio.
We can set up a proportion to solve for the number of boys:
3/5 = x/120
Cross multiplying, we get:
5x = 3 * 120
5x = 360
Dividing both sides by 5, we find that there are x = 360/5 = 72 boys.
Therefore, the answer is A) 75 boys.
To find the number of boys in Grade 8 at Greenview High School, we need to determine the ratio of boys to the total number of learners.
Given that the ratio of girls to boys is 3:5, we can calculate the fraction of boys as 5/(3+5) = 5/8.
To find the number of boys, we multiply this fraction by the total number of learners in Grade 8:
Number of boys = (5/8) * 120
= 600/8
= 75
Therefore, there are 75 boys in Grade 8 at Greenview High School.
The correct answer is A) 75.