Question

if 25 and 35 are the two consecutive class marks of the successive class interval find
and the size of the class ​

Answer 1

If two consecutive class marks are 25 and 35 of two successive class intervals, then the class size is

30

Explanation:

Upper limit (u) = 35

Lower limit (l) = 25

Class Mark = ( u + l) / 2

= ( 35 + 25) / 2

= 60 / 2

= 30