Question

The students of Grade 7 are categorized based on the marks obtained in Physics. The following histogram depicts the data:

How many number of students obtained exactly 40 marks?

• A. 5
• B. 20
• C. Average of 5 and 20
• D. Insufficient data.

Answer 1

The correct option is D Insufficient data.

Histogram does not provide us precise data points as it is derived from a grouped frequency table. Marks Interval Number of Students

$0\le \text{Marks}<40$	$5$
$40\le \text{Marks}<60$	$20$
$60\le \text{Marks}<80$	$50$
$80\le \text{Marks}<100$	$10$

Hence, the given data is insufficient to determine the number of students who obtained exactly 40 marks.

$\therefore$ Correct answer is (d).