Answer
See below.
Work Step by Step
The midrange is the sum of the minimum and maximum data value divided by $2$.
The mode of $n$ numbers is the number or numbers that appear(s) most frequently. If all items appear the same number of times, then there is no mode.
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).
The mean of $n$ numbers is the sum of the numbers divided by $n$.
Here we have $10$ items (obtained by summing the numbers in the right column), thus the mean will be the mean of the $5$th and $6$th item, which according to the table is: $(30+30)/2=30$.
Here the midrange: $\frac{10+50}{2}=30$, the mode: $30$ and the mean: $\frac{1\cdot10+2\cdot20+4\cdot30+2\cdot40+1\cdot50}{10}=30$.
