Averages for 5th Grade: Determining the average of given a sum

What is the average of four numbers that have a sum of 20?

$5$

What is the average of three numbers given that their sum is 9?

$3$

What is the average of four numbers that have a sum of 40?

$10$

What is the average of ten numbers that have an average of 90?

$9$

What is the average of seven numbers with a sum of 28?

$4$

What is the average of ten numbers that have a sum of 5?

$\frac{1}{2}$

What is the average of four numbers that have a sum of 15?

$3\frac{3}{4}$

What is the average of three numbers that have a sum of 10?

$3\frac{1}{3}$