Question

12th
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Answer 1

Boys : girls = 7 : 5
Let the number of boys be 7x
Then the number of girls be 5x

The number of boys is 8 more than the number of girls.
7x = 5x + 8
7x-5x = 8
2x = 8
x = 8/2
x = 4

The number of boys = 7(4) = 28
The number of girls = 5(4) = 20

Total class strength = 28+20
= 48