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Question

The class mark of class interval 25-30 is ______


A

22.5

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B

27.5

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C

25

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D

30

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Solution

The correct option is B

27.5


The class mark of the class interval is given by upper class limit + lower class limit2

Upper class limit = 30; Lower class limit = 25

Hence, Class Mark = 30+252

= 27.5


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