Question

The given histogram shows a frequency distribution of marks obtained by $56$ students in a subject.
Number of students securing marks between $70$ and $100$ is

• A. 2
• B. 4
• C. 6
• D. 8

Answer 1

The correct option is C 6

Frequency density
$=\frac{\text{Frequency in the class}}{\text{Lenght of the class interval}}$
$\therefore 0.2=\frac{\text{Frequency in the class}}{100-70}$
Frequency in the class $=0.2\times 30=6$