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.
Example: [1,3,5]
Example solution: 3.000
Example explanation: The mean of the input list is (1+3+5)/3, which equals 3. This is a good example.

Problem: [117.712, -36.612, -78.147, 243.298, 242.312, 126.511, 88.536, -90.895, 181.052, 117.98]

Solution: 91.175