The first thing you need to do is to add up all of the numbers in the set. Let's say you're working the following set of numbers: 1, 2, 3, and 6. 1+2+3+6=12{\displaystyle 1+2+3+6=12}. There are 4 distinct numbers in the set. So, take the sum of the numbers, 12, and divide it by 4 to get the average.12/4=3{\displaystyle 12/4=3}. The average of the group of numbers is 3.

How would you rephrase that briefly using Indonesian?
Temukan jumlah sekelompok bilangan tersebut. Bagi jumlahnya dengan banyaknya bilangan-bilangan tersebut.