Between two distinct rational numbers a and b, there exists another rational num

Question

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

Options:

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

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

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

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

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

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