Class Mark


 
 
Concept Explanation
 

Class Mark

Class Mark:

It is equal to half of the sum of the lower and upper limits of a class or we can say that the number in the middle of the class interval is the class mark. It is found by adding the upper and lower limits and dividing by two .It can also be found by  adding the upper and boundaries and dividing by two .

Illustration: Find the class mark for the interval 31-40

Solution:

     The class mark can be found by dividing the sum of upper limit and the lower limit of the class

upper limit = 40

lower limit = 31

 So class mark =

   frac{upper;;limit+lower;;limit}{2}=frac{31+40}{2}=frac{71}{2}=35.5

Sample Questions
(More Questions for each concept available in Login)
Question : 1

The class mark of the class is 25 and if the upper limit of that class is 32, the lower limit for that class is ______________________.

Right Option : A
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Explanation
Question : 2

The mid value of 20-36 is _________________________.

Right Option : A
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Explanation
Question : 3

Find the class mark with maximum frequency by using the given data:

Class SizeFrequency
20-408
40-604
60-807
80-1009
100-1202
Total32
Right Option : B
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Explanation
 
 


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