MathNet 2006 — Part 03 Question 24

If $\frac{\sqrt{x}}{\sqrt{y}}=5$ then $\frac{x+y}{2y}$ is equal to:

(A) $5/2$

(B) $3\sqrt{2}$

(C) $13y$

(D) $\frac{25y}{2}$

(E) $13$