JEE Math Practice Question
Let $$\alpha, \beta \in \mathbf{R}$$. Let the mean and the variance of 6 observations $$-3,4,7,-6, \alpha, \beta$$ be 2 and 23, respectively. The mean deviation about the mean of these 6 observations is :
- A.$$\frac{16}{3}$$
- B.$$\frac{11}{3}$$
- C.$$\frac{14}{3}$$
- D.$$\frac{13}{3}$$
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