Question

A.M of a-3d,a-d,a,a+d,a+3d is ​

Answer 1

Step-by-step explanation:

Given observations are a-3d,a-d,a,a+d,a+3d

Sum of all observations

=>a-3d+a-d+a+a+d+a+3d

=>5a

Number of all observations=5

Mean =Sum of all observations/Number of all observations

=>Mean=5a/5

=>AM=a

The Arithmetic Mean of the data=a

Answer 2

answers is a

hope you have understood