MCQ
The class mark of the class $20-30$ is:
- A$20$
- B$30$
- ✓$25$
- D$10$
✓
Answer
Correct option: C.
$25$
Class mark $= \frac{\text{Upper limit+ Lower limit}}{2}$
$\therefore $ Class mark of the class 20-30 $= \frac{30+ 20}{2}= \frac{50}{2}=25$
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