Values in Class 30-40
The frequency of the class 30–40 in the marks distribution of 100 students is 7. Which of the following values are included in this class?
- 30, 37, 34, 30, 35, 39, 32 and also 40
- 30, 37, 34, 30, 35, 39, 32 (40 goes into next class) — Correct Answer
- Only values 31 to 39
- 30, 31, 32, 33, 34, 35, 36 only
Explanation:
Correct Answer Explanation
The class 30–40 contains: 30, 37, 34, 30, 35, 39, 32 = 7 values. The value 40 is NOT included — it goes into the next class 40–50 (exclusive class interval, upper limit excluded).
Key Points:
- In exclusive class intervals, a value equal to the upper class limit goes into the NEXT class.
- So 40 → class 40–50, NOT 30–40.
- If 40 were included in 30–40, frequency would be 9, not 7.
- This is the standard convention used in the exclusive (upper limit excluded) method.
📚 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.
