Question

1. Class mark and class size of the class interval are 25 and 10 respectively then the class interval is
(a) 20 - 30 (b) 30 - 40 (0) 40 - 50 (d) 50 - 60​
give me answer please in description​

Answer 1

Answer:

I don't know I am in class 4

Answer 2

option is incorrect :

answer is 40