Question

ratio of boys and girls in a school is 7 :5 if the total number of students in a school is 480 find the number of boys​

Answer 1

7x +5x =480

12x =480

x =480/12

x = 4

7x =7×4=28

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Answer 2

Step-by-step explanation:

Ratio of boys and girls in the school is 7 : 5

So, let's lake the no. of boys be 7x and no. of girls be 5x.

Total number of students in the school is 480.

So, according to question,

= 7x + 5x = 480

= 12x = 480

= x = 480/12

= 40

So, no. of boys = 7x = 7 × 40 = 280

And no. of girls = 5x = 5 × 40 = 400