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.

[-31.241, 73.981, 127.71, 166.275, 35.028, -10.432]
60.22

[109.74, 169.0, 195.864, -1.043, 51.968, -56.564, 214.711, -78.61, 212.459, 228.74]
104.626

[248.541, 58.818, 55.874, 41.678, 235.605, -82.762, 80.0]

91.108