Question

The class mark and class size are 25 and 10 . Find class interval

Answer 1

Answer:

Step-by-step explanation:

Answer:

Class interval : 6 - 11

Step-by-step explanation:

Given : If the class mark of a class interval is 8.5. The class size is 5.

To find : The class limit of the corresponding class interval?

Solution :

Let the class mark, x=8.5

Class size, h=5

Answer 2

Step-by-step explanation:

let the upper and lower limit be x and y respectively.

so,

(x+y)/2=25

x+y=50

and also

x-y=10

on solving them,

2x=60

x=30

thus,y=20

thus,

the class interval is 20-30