Question

Evaluate the class marks between 10-20 and 20-30​

Answer 1

Step-by-step explanation:

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

Therefore, class mark of 20−30 interval is

2

20+30

=

2

50

=25

Class mark of 10−20 interval is

2

10+20

=

2

30

=15

Answer 2

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

Therefore, class mark of 20−30 interval is

= 20+30 /2 = 50/2 = 25

Class mark of 10−20 interval is

10+20/2 = 30/2 = 15