Question

Question 10
To draw a histogram to represent the frequency distribution.
$\begin{array}{cccccc}\text{Class interval}& 5-10& 10-15& 15-25& 25-45& 45-75\\ \text{Frequency}& 6& 12& 10& 8& 15\end{array}$
The adjusted frequency for the class 25 - 45 is:

A) 6
B) 5
C) 3
D) 2

Answer 1

The answer is D.
Here, minimum class width = 5
Frequency for the interval (25 - 45) = 8
Width of the interval 25 - 45 = 20
$\therefore \text{Adjusted frequency}=\frac{\text{Frequency}}{\text{Class width of(25-45)}}\times \text{Minimum class width}$
Hence, the adjusted frequency for the class 25 - 45 is 2.