The mean is 100.
Work Step by Step
The mean of a set of numbers is found by totaling all the numbers, then dividing the total by the number of items in the set. There are 5 numbers in this set. $(48+72+52+148+180)\div5\longrightarrow$ Add the numbers in parentheses. =$500\div5\longrightarrow$ Divide to find the mean. =100