Arithmetic mean of a series is 15 and if 5 is added in all the items of this series, the new arithmetic mean will be:

The Arithmetic mean of 10 number is -7 . If 5 is added to every number, then the new arithmetic mean is …………… .

Arithmetic mean of these items 5,7,9,15,20 is:

The arithmetic mean of 12 observations is 15. If two observations 20 and 25 are removed then the arithmetic mean of remaining observations is

The arithmetic mean (average) of m and n is 50, and the arithmetic mean of p and q is 70. What is the arithmetic mean of m, n, p and q?

The arithmetic mean of 4 numbers is 15. The arithmetic mean of another 6 numbers is 12. What is the arthmetic mean of the combined 10 numbers?