1999 Gauss 8 Problem 19

In a traffic study, a survey of 50 moving cars is done and it is found that 20\% of these contain more than one person. Of the cars containing only one person, 60\% of these are driven by women. Of the cars containing just one person, how many were driven by men?

\textbf{(A)}\ 10\quad \textbf{(B)}\ 16\quad \textbf{(C)}\ 20\quad \textbf{(D)}\ 30\quad \textbf{(E)}\ 40

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.