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Marks Number of
Students
More than or equal to 0 60
More than 10 or equal to 56(60-4)
10
More than 20 or equal to 40(56-16)
20
More than 30 or equal to 20(40-20)
30
More than 40 or equal to 10(20-10)
40
More than 50 or equal to 3(10-7)
50

Example-6:The following distribution gives cumulative frequencies of ‘more than
type’
Marks obtained No of students
More than 5 or equal to 5 30
More than 10 or equal to 10 23
More than 15 or equal to 15 8
More than 20 or equal to 20 2
Change the above data into a continuous grouped frequency distribution.
Solution: Given distribution is the more than type distribution. Here all 30 students have
obtained more than or equal to 5.Further 23 students have obtained score more than or
equal to 10.So 30 – 23 =7 students lie in the class 5-10.Now we can construct the
continuous grouped frequency distribution is
Marks obtained No of students
5-10 30-23=7
10-15 23-8=15
15-20 8-2 =6
More than 20 or equal to 20 2

Example-7:Change the given data into a continuous grouped frequency
distribution.
Weight (in kg) Number of Students
Less than 38 1
Less than 40 3
Less than 42 5
Less than 44 9
Less than 46 14
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