Answer:
Option B
Explanation:
Given , mean $(\overline{x})$=10
$Mean(\overline{x})= \frac{6+7+10+12+13+\alpha+12+16}{8}$
$\Rightarrow$ $10= \frac{76+ \alpha}{8}$
$\Rightarrow$ $\alpha =4$
$MD(\overline{x})= \frac{ [|6-10|+|7-10|+|10-10|+|12-10|+|13-10|+|4-10|+|12-10|+|16-0|}{8}$
$MD(\overline{x})= \frac{4+3+0+2+3+6+2+6}{8}$
$MD(\overline{x})= \frac{26}{8}=3.25$
