Question

please help me to solve this question​

Answer 1

Answer:

it's a simple answer 20-30=10

Answer 2

Answer:

Class mark is the average of upper limit and lower limit of the given class interval.

Class mark of 10-20 interval is 20+30/2=50/2=25

hence, ur answer is 25

Step-by-step explanation:

Hope it helped u mu dear frnd!!