Question

The class mark of the class 100 $-$ 150:

• A. $100$
• B. $125$
• C. $130$
• D. $150$

Answer 1

The correct option is B $125$

Class mark is the mid point of the class interval.

Therefore the class mark of the class $100-150$ is $\frac{100+150}{2}=\frac{250}{2}=125$