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A cumulative frequency distribution is given below

Class

60-62

63-65

66-68

69-71

72-74

Cumulative frequency

3

20

36

48

50

 

Which one of the following class has maximum frequency?


1. 63-65
2. 66-68
3. 72-74
4. 69-71

1 Answer

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Best answer
Correct Answer - Option 1 : 63-65

Concept:

  • Cumulative frequency distribution is the sum of the frequency of class and all classes below it in a frequency distribution.
  • This means we can get cumulative frequency by adding up a value and all of the values that came before it.

Also,

Frequency of any class=cumulative frequency of class - cumulative frequency of preceding class.

Calculation:

From the above discussion, we can calculate the frequency from the cumulative frequency as below.

Class Cumulative frequency frequency
60 - 62 3 3
63 - 65 20 17
66 - 68 36 16
69 - 71 48 12
72 - 74 50 2


Clearly, from the above table, we can see that the 63 - 65 class has a maximum frequency.

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