Question
The ratio of the number of boys and girls in a college is 7:8. If the percentage increase in the number of boys and girls be 20% and 10% respectively. What will be the new ratio?
Answer: Option C
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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).i.e., (120/100 * 7x) and (110/100 * 8x)i.e., 42x/5 and 44x/5Required ratio = 42x/5 : 44x/5 = 21:22
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