Question

Class mark of a class is _____

• A. Upper limit + lower limit
• B. $\frac{\text{upper limit + lower limit}}{2}$
• C. $\frac{\text{upper limit - lower limit}}{2}$
• D. upper limit - lower limit

Answer 1

The correct option is B

$\frac{\text{upper limit + lower limit}}{2}$

Class mark is the midpoint of a class interval.
Therefore, its formula is given by $\frac{\text{upper limit + lower limit}}{2}$.