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blondinia [14]
2 years ago
14

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

are girls?​
Mathematics
1 answer:
melamori03 [73]2 years ago
7 0

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.

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