Class mark of a particular class is 9.5, then upper limit + lower limit = _______.
19

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Solution

The correct option is A 19
Class mark is always the value midway between the upper limit and the lower limit. In this case given that class mark is 9.5 . Hence

$\frac{u p p e r l i m i t + l o w e r l i m i t}{2}$ = 9.5

Hence upper limit + lower limit = 9.5 x 2 = 19.

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Class mark of a certain class interval is 30 and its lower class limit is 20. Then its upper class limit is

Class mark, upper limit and lower limit of a class can be connected by using:

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The class midpoint is equal to:

(a) The average of the upper class limit and the lower class limit.

(b) The product of upper class limit and the lower class limit.

(d) None of the above.

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