Question

Find the class mark of interval 40-50

Answer 1

UPPER LIMIT + LOWER LIMIT   =  CLASS MARK

                          2

CLASS MARK OF 40-50 :

                 

40+50/2

90/2

45

Answer 2

class mark = lower class limit + upper class limit/2

therefore,

40+50\2

= 45

class mark is 45

hope it helps you