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: [77.848, -4.699, -16.474, -58.741, -55.387, 50.842, -98.719, 117.979, -25.477, -43.193]

-5.602