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.

[-3.857, -93.605, 43.857, -73.731, 84.094, -24.492, -41.811, 115.552, 231.429, 130.678]
36.811

[100.665, 40.782, 24.775, 206.105, 112.523, -96.309, 9.758, 149.054, 3.861, 235.974]
78.719

[-74.782, -33.512, 229.398, -86.473, 141.302, 69.678]

40.935

