Question

the total strength of a school is 1360.for every 15 boys,there is one girl.the number of girs in the school is

Answer 1

let the number of girls be x then number of boys would be 15x.
ATQ:
15x+x=1360
x=1360/16=680/8=85.
number of girls =85.
done.
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Answer 2

Given for every 15 boys,there is one girl i.e, boys:girls=15:1

let boys be 15x and girls be x.from this we get 15x+x=1360.Hence x=85.

there fore no.of girls=85