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.

[246.282, 231.815, 1.709, -51.234, -76.432, 21.802, 18.917, 106.734, 168.909, -67.647]
60.085

[78.523, 239.098, 9.698, 69.94]
99.315

[107.201, 20.191, 238.887, 237.174, 52.537, 99.85, 214.946]

138.684