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Question

If the class marks of a frequency distribution are 19.5,26.5,33.5,40.5,47.5,54.5,61.5 then find the size of the class and the classes.

A
1623,2330,3237,3744,4451,5158,5865
Size of the class is 7
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B
1623,2330,3037,3744,4351,5158,5865
Size of the class is 7
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C
1623,2430,3037,3744,4451,5158,5865
Size of the class is 7
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D
None of these
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Solution

The correct option is C None of these
If the class marks of a frequency distribution are 19.5,26.5,33.5,40.5,47.5,54.5,61.5 then the class size is 26.519.5=7.
Classes are 1623,2330,3037,3744,4451,5158,5865.


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