Question

find class mark of the classes 20-25and35-60​

Answer 1

Answer:

Class mark = Upper class + lower class/2

For 20-25,

= 20 + 25/2 = 22.5

And 35-60,

= 35 + 60/2 = 47.5

Hope it helps you...

Answer 2

Answer:

CLASS MARK = UPPERLIMIT +LOWERLIMIT/2

CLASS MARK OF 20-25 =20+25/2

                                         =45/2

                                         =22.5

CLASSMARK OF 35-60=35+60/2

                                      =95/2

                                      =47.5