Answer
$5$
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 $28$ items (obtained by summing the numbers in the right column), thus the mean will be the mean of the $14$th and the $15$th, which according to the table is: $(5+5)/2=5$