Add the lower class limit and upper class limit of the class interval
Divide the sum by 2
Use the formula: Class Mark = (Lower Class Limit + Upper Class Limit) รท 2
The result is the class mark of that class interval
Add the lower class limit and upper class limit of the class interval
Divide the sum by 2
Use the formula: Class Mark = (Lower Class Limit + Upper Class Limit) รท 2
The result is the class mark of that class interval