CBSE Class 10 Maths Arithmetic Mean of Grouped Data

Q.

The mean of 10 observations is 8, and if each observation is divided by 2, then the new mean is



Q.

The mean of 8 numbers is 20. If 3 is subtracted from every number, then what will be the new mean?



Q.

Which of the following is the formula for mean using the step deviation method?



This video explains how to calculate arithmetic mean of grouped data by using three different methods, Direct, short cut and step deviation method.