For data with mean $20$ and $5$ values, if a new value $30$ is added, new mean is

For data with mean $20$ and $5$ values, if a new value $30$ is added, new mean is
  1. $\dfrac{130}{6}$
  2. $25$
  3. $50$
  4. $30$

Solution

Old sum $= 100$. New sum $= 130$. New mean $= \dfrac{130}{6} \approx 21.67$.

Asked in: MH-SSC-9

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