If x : y = 3 : 5 and x - y = -2, then the value of x + y is?

Answer: Option A

$$\begin{array}{rl}& x:y=3:5\\ & x-y=-2\\ & \frac{x}{y}=\frac{3}{5}\\ & x-y=3-5\\ & \iff -2=-2\\ & x=3,y=5\\ & x+y=3+5\\ & \iff x+y=8\end{array}$$