Question

The ratio of boys and girls is 3:31 if 6 boys left the school and 22 girl left the school now the ratio of boys and girl is 1: 13 find out the total no. Of boys initially

Answer 1

Answer:

Let the initial number of boys and girls be 3x and 31x.

Number of boys after = 3x - 6

Number of girls after = 31x - 22

$= > \frac{3x - 6}{31x - 22} = \frac{1}{13}$

$= > 13(3x - 6) = 1(31x - 22)$

$= > 39x - 78 = 31x - 22$

$= > 8x = 56$

$= > x = 7$

Initial number of boys = 3x = 3(7) = 21

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