Statistical Description of DataPYQ June 19Question 2684 of 295
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Class | 0-10 | 10-20 | 20-30 | 30-40 | 40-50Freq. | 4 | 6 | 20 | 8 | 3For the class 20-30. Cumulative frequency is:

Options

A10
B26
C30
D41
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Correct Answer

✅ Option c — 30

All Options:

  • A10
  • B26
  • C30
  • D41

Detailed Solution & Explanation

To find the cumulative frequency of the class interval 20−30\displaystyle 20-30 from the given frequency distribution, we sum the frequencies of all class intervals preceding it along with the frequency of the class interval 20−30\displaystyle 20-30 itself. The given frequencies are 4\displaystyle 4 for 0−10\displaystyle 0-10, 6\displaystyle 6 for 10−20\displaystyle 10-20, and 20\displaystyle 20 for 20−30\displaystyle 20-30. Therefore, the cumulative frequency for the class 20−30\displaystyle 20-30 is calculated as 4+6+20=30\displaystyle 4 + 6 + 20 = 30. Hence, **Option C** is the correct answer.

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