What is class mark and how is it calculated??
Class marks are used to draw the frequency polygon.
The method to calculate class marks is shown below:
The class mark for class interval 50-100 is 
What are you looking for?
What is class mark and how is it calculated??
Class marks are used to draw the frequency polygon.
The method to calculate class marks is shown below:
The class mark for class interval 50-100 is