The arithmetic mean with a natural number as a result

Compute the arithmetic mean of the following numbers

19 ; 18 ; 12 ; 19 is

Remember !

The arithmetic mean formula is a fraction where we have at the numerator the sum of the collection of numbers and the denominator is the number of numbers in the collection.

Exemple !

2 + 3 + 7 12
=
3 3

By learning math, you learn to think.