Question

.. What is the class mark of the class interval 25 - 35.​

Answer 1

Alo... dear❤❤

The class marks of 25-35 is 30

Class mark is the avg. Of the limits of interval time...

Hope uh understand well...!!

Answer 2

$class \: mark = \frac{upper \: limit \: + lower \: limit}{2}$

$= \frac{25 + 35}{2}$

$\frac{60}{2} = 30$