MCQ
What is the class Mark of the interval $15 - 20$?
- A$20$
- ✓$17.5$
- C$35$
- D$15$
✓
Answer
Correct option: B.
$17.5$
Class mark is the mid-value of each class interval.
For class interval $15 - 20$.
Class mark $=\frac{15+20}{2}=\frac{35}{2}=17.5$
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