The Class Mark of Class 90-130 is

Calculating the class mark of class 90-130

The Solution:

The explanation says that the classmark is addressed as the mean of the lower limit & the upper limit of the remarked class intervals.

Now furthermore, let us calculate some numbers to find out the answer

Thus, 

Classmark = (Lower Limit + the Upper limit), which is equally divided by 2

Now Class Mark, which is = to 

(90 + 130) divided by 2

After the calculation, we will divide it by 2

220 divided by 2

The answer to this question will be 110. 

So, the class mark of class 90-130 will be 110 after all the calculations.