Class mark of a particular class is 11.5, then upper limit + lower limit = _______. [3 Marks]

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Solution

Class mark is always the value midway between the upper limit and the lower limit. In this case given that class mark is 11.5 .[1 Mark]

Hence,

$\frac{u p p e r l i m i t + l o w e r l i m i t}{2}$ = 11.5 [1 Mark]

Hence, upper limit + lower limit = 11.5 x 2 = 23. [1 Mark]

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