1999 Pascal Problem 8

The average of four test marks was 60. The first three marks were 30, 55 and 65. What was the fourth mark?

\textbf{(A)}\ 40\quad \textbf{(B)}\ 55\quad \textbf{(C)}\ 60\quad \textbf{(D)}\ 70\quad \textbf{(E)}\ 90

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.