Find the class mark of the class intervals 3.5 - 6.5
CLASS MARK= (UPPER LIMIT+ LOWER LIMIT/ 2)
=> 3.5+6.5/2
=> 10/2= 5
THEREFORE, THE CLASS MARK OF CLASS INTERVAL 3.5-6.5= 5
=> 3.5+6.5/2
=> 10/2= 5
THEREFORE, THE CLASS MARK OF CLASS INTERVAL 3.5-6.5= 5