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To draw a histogram to represent the following frequency distribution :
Class Interval 5-10 10-15 15-25 25-45 45-75
Frequency 6 12 10 8 15
the adjusted frequency for the class 25-45 is :
a. 6
b. 5
c. 3
d. 2

Solution:

We know that

Minimum class width = 5

Frequency in the interval 25-45 = 8

Width of interval 25-45 = 20

The formula used to calculate adjusted frequency is

Adjusted frequency = Frequency/ Class width of 25-45 × Minimum class width

Substituting the values

= 8/20 × 5

By further calculation

= 8/4

= 2

Therefore, the adjusted frequency for the class 25-45 is 2.

✦ Try This: In the class intervals 2-4, 4-6 the number 4 is included in : a. 2-4, b. 4-6, c. all the intervals, d. None of the above

☛ Also Check: NCERT Solutions for Class 9 Maths Chapter 14

NCERT Exemplar Class 9 Maths Exercise 14.1 Problem 10

To draw a histogram to represent the following frequency distribution : Class Interval 5-10 10-15 15-25 25-45 45-75 Frequency 6 12 10 8 15 the adjusted frequency for the class 25-45 is : a. 6, b. 5, c. 3, d. 2

Summary:

To draw a histogram to represent the following frequency distribution in then table mentioned, the adjusted frequency for the class 25-45 is 2

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