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What is the cumulative frequency of the modal class of the following distribution ?

Class 3 – 6 6 – 9 9 – 12 12 – 15 15 – 18 18 – 21 21 – 24
Frequency 7 13 10 23 54 21 16

1 Answer

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Best answer

Here the maximum class frequency is 23, and the class corresponding to this frequency is 12 -15.

So, the modal class is 12.15. 

Now, to find the cumulative frequency let us put the data in the table given below:

Thus, the cumulative frequency of the modal class is 53.

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