Class Mark of 80-90
In a frequency distribution of marks of 100 students, what is the class mark of the class 80–90?
- 80
- 90
- 85 — Correct Answer
- 10
Explanation:
Correct Answer Explanation
Class Mark of 80–90 = (80 + 90) / 2 = 170 / 2 = 85.
All Class Marks (Marks Distribution):
- 0–10: 5, 10–20: 15, 20–30: 25, 30–40: 35
- 40–50: 45, 50–60: 55, 60–70: 65, 70–80: 75
- 80–90: 85, 90–100: 95
Class Frequencies:
- 80–90: frequency = 5 (observations: 82, 82, 82, 80, 85)
📚 About this Topic — CH-3: Organisation of Data
This multiple choice question is from CH-3: Organisation of Data, NCERT Books, Statistics for Economics. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from CH-3: Organisation of Data to strengthen your preparation.
