What will be the class mark of the class 85-95?

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100

110

120

answer is C.

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Detailed Solution

We have to find the class mark of the class 85-95.
Using the formula for the class mark of a class:

(upper limit + lower limit) 2

The upper limit of the class is 95 and the lower limit of the class is 85.
Substituting 95 for the upper limit and 85 for the lower limit in the above formula:

95 + 85 2 = 1802 = 90

So, the class mark of the given class is 90.
Therefore, option 3 is correct.

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