Definition: In this task you will be given a list of numbers and you need to find the mean (average) of that list. The mean of a list can be found by summing every number in the list then dividing the result by the size of that list. The output should be rounded to 3 decimal places.
Input: [-52.28, 151.761, 101.292, 121.159, 10.621, 165.968, 10.761, -84.867, 150.813, 126.95]

70.218