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$\begin{tabular}{|c|c|} \hline Voice type & Number of singers \\ \hline Countertenor & 4 \\ \hline Tenor & 6 \\ \hline Baritone & 10 \\ \hline Bass & 5 \\ \hline \end{tabular}$<br/><br/>A total of 25 men registered for singing lessons. The frequency table shows how many of these singers have certain voice types. If one of these singers is selected at random, what is the probability he is a baritone?