Mathematics - Statistics Question with Solution | TestHub

$\begin{array}{ccc}\text{Class }& \text{Frequency }& \text{Cumulative frequency }\\ 0-4& 3& 3\\ 4-8& 9& 12\\ 8-12& 10& 22\\ 12-16& 8& 30\\ 16-20& 6& 36\end{array}$

$M=l+\left(\frac{\frac{N}{2}-C}{f}\right)h$

Here, $N=3+9+10+8+6=36$

$\Rightarrow \frac{N}{2}=18$

So, median class is $\left(8-12\right)$

$\Rightarrow l=8, C=22, f=10, h=4$

$\Rightarrow M=8+\frac{18-12}{10}\times 4$

$\Rightarrow M=10.4$

$\Rightarrow 20 M =208$