If x : y = 7 : 3 then the value of $$\frac{{xy + {y^2}}}{{{x^2} - {y^2}}}{\text{ is?}}$$

A. $$\frac{3}{4}$$

B. $$\frac{4}{3}$$

C. $$\frac{3}{7}$$

D. $$\frac{7}{3}$$

Answer: Option A

Solution(By Examveda Team)

$$\eqalign{ & x:y \cr & 7:3{\text{ }} \cr & \therefore {\text{ }}\frac{{xy + {y^2}}}{{{x^2} - {y^2}}} \cr & = \frac{{21 + 9}}{{49 - 9}} \cr & = \frac{{30}}{{40}} \cr & = \frac{3}{4} \cr} $$