Question

In the class intervals 10 – 20, 20 – 30, the number 20 is included in ______.

Options

• 10 – 20

• 20 – 30

• both the intervals 

• none of these intervals

Answer 1

In the class intervals 10 – 20, 20 – 30, the number 20 is included in 20 – 30.

Explanation:

Since, the class interval 10 – 20 is the first interval of frequency distribution and 20 – 30 is the next one but the number 20 is present in both intervals.

We know that, the presence of 20 in the interval 10 – 20 is not fully 100% while in the next interval 20 – 30, presence of it fully 100%.