Question

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

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

Answer 1

The correct option is D

$30$

Calculate the lower limit of the fourth class of the given frequency distribution

The lower value of the class interval is called its lower limit.

Here, the class size is $10$. Therefore,

The first class of the frequency distribution is $0-10$.

The second class of the frequency distribution is $10-20$.

The third class of the frequency distribution is $20-30$.

The fourth class of the frequency distribution is $30-40$.

Therefore, the lower limit of the fourth class of the given frequency distribution is $30$.