Data and Displays · Challenge problem

Class A's scores: $5 \mid 8$, $\ 6 \mid 3~7$, $\ 7 \mid 1~4~4~9$, $\ 8 \mid 2~6$, $\ 9 \mid 0$. Class B's scores: $6 \mid 5~9$, $\ 7 \mid 2~8$, $\ 8 \mid 1~3~5~8$, $\ 9 \mid 1$. Find the median of all the scores of both classes together.