what is class mark of class interval
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The ends of a class interval is called class limits, and the middle of an interval is called a class mark and the middle of a class interval is called the class mark.
The average of upper limit and lower limit of a class is the class mark
CLASS MARK=UL+LL/2
The average of upper limit and lower limit of a class is the class mark
CLASS MARK=UL+LL/2
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