Question

Arithmetic mean of a given list of N numbers is
P. X is added to each of these numbers in the list
and then each of the numbers in the new list
formed is divided by O to form the final list. What
will be the arithmetic mean of the numbers in the
final list?
​

Answer 1

Answer:

$\frac{P + X}{O}$

Step-by-step explanation:

On adding something to all the elements of a list, the average is changed to old average + that something.

On dividing all the elements of a list by something, the new average is the old one divided by that something.

Answer 2

The common difference will still remain the same and there will be no change.