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13.The mode of the following series is 36. Find the missing frequency in it.
Class Interval 0 - 10 10 – 20 20 – 30 30 - 40 40 - 50 50 - 60 60 - 70
Frequency 8 10 X 16 12 6 7

14.The following table shows the marks obtained by 100 students of class X in a school during a
particular academic session. Find the mode of this distribution.
Marks No of students
Less then 10 7

Less then 20 21
Less then 30 34

Less then 40 46
Less then 50 66
Less then 60 77

Less then 70 92
Less then 80 100

15.The following table shows the marks of the students of class X in a school during a particular
academic session. Find the mode of this distribution.
Marks Number of Students
More than 0 60
More than 10 56
More than 20 40
More than 30 20
More than 40 10
More than 50 3

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