Find the mean deviation about the mean for the following continuous distribution

$\overline{x}=a+\left(\frac{\mathrm{\Sigma }{f}_i{d}_i}{N}\right)h=130+\left(\frac{-47}{100}\right)10=130-4.7=125.3$

Mean deviation about the mean $=\frac{1}{N}\sum _{i=1}^6 f_i\left|x_i-\overline{x}\right|=\frac{1128.8}{100}=11.288$