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Arithmetic Aptitude :: Ratio & Proportion

9. What must be added to the two numbers, which are in ratio 5 : 12, so that the new ratio becomes 3:4?

Answer: Option D

Explanation :

Let x be the required number.
Then, According to the question,
=> (5+x)/(12+x) = 3/4
=> 20 + 4x = 36 + 3x.
=> x = 16.

Asked In :: iGate

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