\begin{array}{|c|r|r|r|r|r|r|}
\hline Amount (in Naira) & 3 & 6 & 9 & 12 & 15 & 18 \\
\hline Number of Students & 3 & 9 & 6 & 15 & 3 & 12 \\
\hline
\end{array}

Find the median of the distribution