Respuesta :

[tex]\begin{gathered} \text{Grade}\Rightarrow A=4,B=3,C=2 \\ \text{Grade average}\Rightarrow\frac{A+B+C}{3} \\ \text{Grade average}\Rightarrow\frac{4+3+2}{3} \\ \text{Grade average=3} \end{gathered}[/tex]