The mean is the average of a set of numbers.
It is calculated by dividing the sum of all the items in a set by the total number of items in the set.
When there are only two numbers, the mean is easy to find. It is simply the number that is halfway between the two numbers of the set.
To find the mean of more than two numbers, first add all the elements of the given set and then divide the obtained sum by total number of elements.