Question

find class mark of 80_90​

Answer 1

Answer:

85 is the class mark of 80-90

Answer 2

Answer:

Hey mate! Here's your answer::

If you want to find the class mark of a given interval say 80 -90 then you have to follow the steps below::

First find the sum of the upper and the lower limit.

i.e 90+80 =170.

Now divide it with 2.

170/2

= 85 (is the answer)...