It's 20. Since it is median you will have to find the middle number. So in the sequence in order: 16, 18, 19, 20, 22, 22, 36. Next you will just find which number is in the middle. Also, tip: When doing this, if you have two medians such as 22 and 23. You will go to the number in between those, which would be 22.5.