2015 Pascal Problem 6

The average age of Andras, Frances and Gerta is 22 years. What is Gerta's age?

\begin{array}{|c|c|}\hline \text{Name} & \text{Age (Years)} \\ \hline \text{Andras} & 23 \\ \text{Frances} & 24 \\ \text{Gerta} & ? \\ \hline \end{array}

\textbf{(A)}\ 19\quad \textbf{(B)}\ 20\quad \textbf{(C)}\ 21\quad \textbf{(D)}\ 22\quad \textbf{(E)}\ 23

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Pascal contests here.