Question

The Intervals of class 80-90, 90-loo ls​

Answer 1

To calculate the mean of a continuous series, mid points of the various class intervals is taken before calculating the mean which is also called the class mark. For example, if the class interval is 80-90 then before calculating the mean mid point that is the class mark is calculated which is 85.

Answer 2

Answer:

Kya nikalana hai mean , median, mode