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There is increase of 20% in on of studen...

There is increase of `20%` in on of students in college .According to the new law of country , girls are exempted from educational fee. There is `25%` increase in the fees collected from boys from last year , then what is the ratio of girls to boys .

A

`2 : 1`

B

`1 :4`

C

`4 :3`

D

` 3: 4`

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