Answer
$6$
Work Step by Step
The median of $n$ numbers is the middle number of the numbers when they are in order (and the mean of the middle $2$ numbers if $n$ is even).
Here we have $46$ items (obtained by summing the numbers in the right column), thus the mean will be the mean of the $23$rd and the $24$th, which according to the table is: $(6+6)/2=6$