Observations in Class 10-20
In the frequency distribution of marks of 100 students, the class 10–20 has a frequency of 8. Which observations are included?
- 10, 11, 12, 13, 14, 15, 16, 17
- 10, 14, 17, 12, 14, 12, 14, 14 (total 8 values) — Correct Answer
- 11, 12, 13, 14, 15, 16, 17, 18
- 10, 20 and six values in between
Explanation:
Correct Answer Explanation
Class 10–20 contains: 10, 14, 17, 12, 14, 12, 14, 14 — a total of 8 values (frequency = 8).
Key Points:
- All these values lie in the range ≥10 and <20.
- Tally mark for this class = ////̶ /// (5+3 = 8).
- Class Mark = (10+20)/2 = 15.
- In further calculations, all 8 values are represented by the class mark 15.
📚 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.
