Question

In a frequency distribution with classes 0-10, 10-20, etc., the size of the class intervals is 10. The lower limit of fourth class is:

• A. 20
• B. 30
• C. 40
• D. 50

Answer 1

The correct option is B 30

In the questions classes are given as: 0-10 and 10-20.
As, the class interval of given classes is 10, so the next classes will be 20-30 and 30-40.
So, the fourth class is 30-40.
Hence, the lower limit of fourth class is 30.