Question

The histogram for the following

$\begin{array}{cccccc}\text{Class Marks}& 25& 35& 45& 55& 65\\ \text{Frequency}& 7& 15& 18& 12& 8\end{array}$

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

As the difference between the values of the consecutive class mark is 10,

therefore subtract $\frac{10}{2}=5$ from each class mark to get the lower limit

and add 5 to each class mark to get the upper limit.

Thus, the given frequency distribution will be of the form

$\begin{array}{cc}\text{CI}& \text{Frequency}\\ 20-30& 7\\ 30-40& 15\\ 40-50& 18\\ 50-60& 12\\ 60-70& 8\end{array}$