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: [-75.585, 100.466, 173.612, -49.914, -3.926, 123.033, -41.309, 11.466, -27.853, 192.989]

40.298