the ratio of boys to girls in the grade 3 classes at domino primary school is 3:5 . if there are 280 grade 3 learners, how many

Question

2 years ago

14

are girls?

1 answer:

melamori03 [73] · Answer 1 · 2022-09-23T18:09:52+03:00

9514 1404 393

Answer:

175

Step-by-step explanation:

Let g represent the number of girls. Then 280-g is the number of boys. Their ratio is ...

boys/girls = 3/5 = (280-g)/g

Clearing fractions gives ...

3g = 5(280 -g)

8g = 1400 . . . . eliminate parentheses, add 5g

g = 175 . . . . . . . divide by 8

There are 175 girls in the grade 3 classes at Domino Primary School.