Between two distinct rational numbers a and b, there exists another rational number which is :

A. $$\frac{a}{2}$$

B. $$\frac{b}{2}$$

C. $$\frac{ab}{2}$$

D. $$\frac{a + b}{2}$$

Answer: Option D

Solution(By Examveda Team)

If a and b are two rational numbers, then $$\frac{a + b}{2}$$   is a rational number lying between a and b.