Discussion

Question:

What should be subtracted from the numbers in the ratio 9 : 16 so as to get 1 : 2?

Explanation:

Two numbers are in the ratio of 9 : 16. Let the numbers be 9x and 16x.

Now, let a be subtracted to get new ratio as 1 : 2.

∴ $\frac{9 x - a}{16 x - a} = \frac{1}{2}$

⇒ 18x - 2a = 16x - a

⇒ 2x = a

Since we do not know the value of x, we cannot find out the value of a.

Hence, option (d).

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