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

Options

A. 40
B. 50
C. 20
D. 30

Answer

To find the lower limit of the fourth class in a frequency distribution with classes of size 10, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Class Intervals**: The classes are given as 0-10, 10-20, 20-30, and so on. Each class is of size 10.

2. **List the Classes**:
- 1st class: 0-10
- 2nd class: 10-20
- 3rd class: 20-30
- 4th class: 30-40

3. **Determine the Lower Limit of the 4th Class**:
- The lower limit of the 4th class is the starting point of that class. From our list, the 4th class is 30-40.
- Therefore, the lower limit of the 4th class is **30**.

### Final Answer:
The lower limit of the fourth class is **30**.

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