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  • For the following distribution : Marks Number of students Below 10 Below 20 Below 30 Below 40 Below 50 Below 60 3 12 27 57 75 80 the modal class is (A) 10-20 (B) 20-30 (C) 30-40 (D) 50-60

For the following distribution :

Marks Number of students
Below 10
Below 20
Below 30
Below 40
Below  50
Below 60		 3
12
27
57
75
80

the modal class is
(A) 10-20                    (B) 20-30                     (C) 30-40                     (D) 50-60

Answers (1)

Answer. [C]
Solution.
Frequency distribution: It tells how frequencies are distributed over values in a frequency distribution. However mostly we use frequency distribution to
summarize categorical variables.

Marks Frequency Cumulative Frequency
0-10 3 3
10-20 12-3=9 12
20-30 27-12=15 27
30-40 57-27=30 57
40-50 75-57=18 75
50-60 80-75=5 80
  =80  

The class with highest frequency is 30-40
Hence 30 – 40 is the modal class.

 

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infoexpert27

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