Question

formula how to find classmark​

Answer 1

Step-by-step explanation:

Classmark: Mid-value of each class interval is called its class mark.

Classsize: Difference between the true upper limit and true lower limit of a class interval is called the class size.

⇒ Classmark=

2

Upperlimit+Lowerlimit

⇒ Classsize=Upperlimit−Lowerlimit

Answer 2

if class interval is x-y

then,

lower limit - x

upper limit - y

class mark of the interval = x+y / 2