Translate the Stated Rule or Relationship to a Formula $a, b$

Multiple Choice

Translate the stated rule or relationship to a formula.
-To calculate the average, A, of 3 numbers $a, b$ , and c, we divide the sum of the three numbers by three.

A) $A=\frac{a}{3}+b+c$
B) $A=\frac{3}{a+b+c}$
C) $\mathrm{A}=\frac{\mathrm{a}+\mathrm{b}+\mathrm{c}}{3}$
D) $A=a+b+c$