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Question
Marks of students of a Class are represented in the frequency polygon shown below.
How many students got marks less than 20?
Marks of students of a Class are represented in the frequency polygon shown below.
How many students got marks less than 20?
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Solution
The correct option is B 39
There are the four groups who got marks less than 20 in the test.
Respective groups are (0-5), (5-10), (10-15) and (15-20).
Total number of students who got marks less than 20 in the test is the sum of frequency of the respective four groups = 7+10+14+8 = 39.
There are the four groups who got marks less than 20 in the test.
Respective groups are (0-5), (5-10), (10-15) and (15-20).
Total number of students who got marks less than 20 in the test is the sum of frequency of the respective four groups = 7+10+14+8 = 39.
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