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Answer with Explanation:

Originally, let the number of boys and girls in the college be 7x and 8x respectively.

Their increased number is (120% of 7x) and (110% of 8x).

=>(120/100 x 7x) and (110/100 x 8x)  

=> 42x/5 and 44x/5 

Therefore,The required ratio = (42x/5 : 44x/5) = 21 : 22. 


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