Question

write the class marks of 11-20 and21-30

Answer 1

Answer:

Class mark is the mid point of each class . for example class mark =upper limit _ lower limit ÷ 2

Step-by-step explanation:

class mark of 11-20 is 20-11 ÷ 2 = 5 and. class mark of 21 -30 is also 5