Midpoint of $-\dfrac{1}{3}$ and $\dfrac{1}{3}$ is

Midpoint of $-\dfrac{1}{3}$ and $\dfrac{1}{3}$ is
  1. $0$
  2. $\dfrac{1}{3}$
  3. $\dfrac{2}{3}$
  4. $\dfrac{1}{6}$

Solution

Symmetric about $0$.

Asked in: IMO

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