The sum of two numbers is 40 and their difference is 4. The ratio of the numbers is :

A. 11 : 9

B. 11 : 18

C. 21 : 19

D. 22 : 19

Answer: Option A

Solution(By Examveda Team)

Let the numbers be x and y
Then,
$$\eqalign{ & \Leftrightarrow \frac{{x + y}}{{x - y}} = \frac{{40}}{4} \cr & \Leftrightarrow \frac{{x + y}}{{x - y}} = 10 \cr & \Leftrightarrow \left( {x + y} \right) = 10\left( {x - y} \right) \cr & \Leftrightarrow 9x = 11y \cr & \Leftrightarrow \frac{x}{y} = \frac{{11}}{9} \cr & \Leftrightarrow x:y = 11:9 \cr} $$