Sorry, Red, but you have it wrong. The mean is the mathematical average of all numbers in a data set. The median is the exact middle value of a data set when the numbers are sorted in order.
Here is an illustration where the an original set of scores has two more included. In the illustration, the numbers 75.5, 83, and 41 &90 are obtained from the original data. The numbers 73.1, 82 and 42 are what one gets after inculding the two extra scores.
We give a stvff because a lot of us here have decided that accuracy in posts is important. That is why we like to see where the support for a comment comes from. In my post here, the diagram comes from a Google search for the difference between 'mean and median', as well as the fact that back in the day I did a course in statistics at Uni, and the topic is usually included in high school Maths.