Question

Write the class marks of the class interval $30-40$.

Answer 1

Finding class marks:

The class marks of a class interval is computed as,

Class mark $=\frac{\mathrm{upper}\mathrm{limit}+\mathrm{lower}\mathrm{limit}}{2}$

Given that, $\mathrm{upper}\mathrm{limit}=40,\mathrm{lower}\mathrm{limit}=30$

$\therefore$ Class marks $=\frac{40+30}{2}$

$$\begin{gathered} \Rightarrow =\frac{70}{2} \\ \Rightarrow =35 \end{gathered}$$

Hence, the class marks is $35$.