In this problem we have to order the number of songs so the nwe order will be:
[tex]2,3,5,9,12,21[/tex]now we calculate the mean of the two numbers in the middle because there are even numbers so:
[tex]\begin{gathered} m=\frac{5+9}{2} \\ m=\frac{14}{2} \\ m=7 \end{gathered}[/tex]So the median are 7 songs