Question

4. In a class interval 20-25. the numerical 22.5 is called
(a)Class mark
(b) Range
(c)Width
(d) Size of the class​

Answer 1

Answer:

a) Class mark

step by step explanation:

20+25/2= 22.5

I hope it will help you

Answer 2

Answer:

(a)Class mark

Example:

Class marks are: 15,20,25,...

• Lower limit of class 20 is mean of 15 and

20= 15+20/2 =17.5

• Upper limit of class 20 is the mean of 20 and

25= 20+25/2 =22.5

20 is the class mark for the class interval 17.5−22.5