The average of 12 numbers is 15 and the average of the first two is 14. What is the average of the rest? (a) 15 (b) `15 1/5` (c) `14` (d) `14 1/5`

The average of 20 numbers is 15 and the average of first five is 12.The average of the rest is

The average of 8 numbers is 14. The average of 6 of these numbers is 16. What is the average of the remaining two numbers?

What is the average of the set {2, 5, 8, 11, 14} ?

In a set of three numbers, the average of the first two numbers is 7, the average of the last two numbers is 10, and the average of the first and the last numbers is 14. What is the average of the three numbers?