Question

a class mark of 90-120 IS​

Answer 1

Answer:

class mark = upper limit + lower limit /2

=120+90/2

210/2

=105

Answer 2

Answer:105

Step-by-step explanation:

For the class interval 90-120,

Lower limit L.B.= 90

Upper limit U.B.= 120

Class mark= (L.B.+U.B.)/2

= (90+120)/2

= 210/2 = 105