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Question
Find the class-marks of the classes 10 – 25 and 35 – 66.
Sum
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Solution
Class mark of 10 – 25
= `(10 + 25)/2`
= `35/2`
= 17.5
And class mark of 35 – 55
= `(35 + 55)/2`
= `90/2`
= 45
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