2001 Gauss 7 Problem 9

The bar graph shows the hair colours of the campers at Camp Gauss. The bar corresponding to redheads has been accidentally removed. If 50\% of the campers have brown hair, how many of the campers have red hair?

\textbf{(A)}\ 5\quad \textbf{(B)}\ 10\quad \textbf{(C)}\ 25\quad \textbf{(D)}\ 50\quad \textbf{(E)}\ 60

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 Gauss contests here.