Read the given data and answer the question that follows.

2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21, 17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25

If the given data is grouped in the classes 0-5, 5-10, 10-15, and so on, then what will be the frequency of the class 20-25?

Correct option is B

Given:

The data provided is:

2,5,15,25,20,12,8,7,6,16,21,17,30,32,23,40,51,15,2,9,57,19,25
The classes are:

0–5, 5–10, 10–15, 15–20, 20–25, and so on.

to find the frequency of the class 20–25.

Concept Used:
The frequency of a class is the count of data points that fall within that class interval.
For a class a–b, the values x such that  a ≤  x < b are included.

Solution:

Identify the values that fall within the class 20–25(i.e., 20 ≤ x < 25):

From the given data: 20, 21 ,23

Total: 3 values.

The frequency of the class 20–25 is 3

Option (b) is right