Instructions

Read the following graph and answer to the questions below.
The following histogram represents the frequency distribution of marks of 80 students in a class. Here the class interval a-b includes all marks greater than or equal to a and less than b except for the interval 80-100, where both the end points are included.

No.of Students

Marks

Question 22

The number of students scoring less than 80 marks but not less than 40 marks is

Solution

The number of students scoring less than 80 marks but not less than 40 marks = 30+15 = 45

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The number of students scoring less than 80 marks but not less than 40 marks is

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