2010 · Q70
The marks of the students of a class who appeared for a test in English are represented in the following frequency table:
Class interval: 1-10 (f=9), 11-20 (f=22), 21-30 (f=_), 31-40 (f=20), 41-50 (f=12), 51-60 (f=8); Total frequency = 100
What is/are the modal class(es) ?
Elementary MathematicsStatistics
- A10.5 – 20.5 only
- B20.5 – 30.5 only
- C10.5 – 20.5 and 20.5 – 30.5
- DThere is no modal class
Explanation
Missing frequency 29 makes 20.5-30.5 the modal class.