\[\begin{align}  & Mean\text{ }mark=\overline{x}=\frac{\sum{fx}}{\sum{f}} \\ & \overline{x}=\frac{(1\times 2)+(2\times 2)+(3\times 8)+(4\times 4)+(5\times 4)}{2+2+8+4+4} \\ & \overline{x}=\frac{66}{20}=3.3 \\\end{align}\]