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.

[211.892, 69.725, 110.579, 178.646, 32.595, 163.527, 229.039, -42.103, 51.631, 165.973]
117.15

[-51.127, -53.399, -58.094, 172.367, -29.286, 109.468, -34.858, -99.953, 9.617, -8.063]
-4.333

[149.965, 134.053, -8.159, 112.116, 197.979, -74.207, 9.947]

74.528