Answer the following. Write and show your solutions



1. The average of 4 numbers is 10. Find the 4th number given the first 3
numbers; 8, 12, and 15.

2. The average of 6 numbers is 9. Find the 6th number given the first 5
numbers; 7, 10, 11, 5, and 19.

3. The average of 7 numbers is 11. Find the 7th number given the first 6
numbers; 4, 6, 11, 13, 15 and 16.

4. The average of 4 numbers is 1.5. Find the 4th number given the first 3
numbers; 1, 1, and 2.

5. The average of 5 numbers is 4.6. Find the 5th number given the first 4
numbers; 3, 5, 5 and 6.