Answer:
A) [tex]\frac{x+y+z}{3}[/tex]
Step-by-step explanation:
the formula for average is the sum of the digits, then divide that sum by the number of digits.
for example: let x = 1, let y = 2, let z = 3
so 1+2+3 is 6
then divided by the number of digits: 3
6/3=2
the average is 2
