Question

The following table gives the marks obtained by the students of a class in English.
$\begin{array}{cc}\text{Marks}& \text{Number of students}\\ 30& 2\\ 40& 5\\ 50& 14\\ 60& 21\\ 70& 23\\ 80& 8\\ 90& 7\\ 100& 1\end{array}$

Which of the following is true ?

• A. The frequency for class interval 85-95 is 8
• B. The frequency for class interval 85-95 is 7
• C. The frequency for class interval 85-95 is 73
• D. The frequency for class interval 9-105 is 74

Answer 1

The correct option is B

The frequency for class interval 85-95 is 7

In the given data, the marks are given individually, which is the raw data.
Hence, it is ungrouped data.

The frequency distribution table for the given data is

$\begin{array}{cc}\text{Marks(Class Interval)}& \text{Number of students(Frequency)}\\ 25-35& 2\\ 35-45& 5\\ 45-55& 14\\ 55-65& 21\\ 65-75& 23\\ 75-85& 8\\ 85-95& 7\\ 95-105& 1\end{array}$