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Question

Class mark of a particular class is 9.5 and the class size is 6, then the class interval is


A
3.5 - 15.5
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B
12.5 - 18.5
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C
6.5 - 12.5
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D
15.5 - 27.5
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Solution

The correct option is C 6.5 - 12.5

Classmark} = 9.5
Upper limit of class = Class mark+class size2=9.5+3=12.5
Lower limit of class = Class markclass size2=9.53=6.5
Hence, the class interval is 6.5-12.5.


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