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.

[EX Q]: [-53.388, 31.309, 19.079, -16.926, 242.421, 210.599]
[EX A]: 72.182

[EX Q]: [-40.509, 201.39]
[EX A]: 80.44

[EX Q]: [85.433, 9.094, 98.364, 175.424, 105.707, 80.646, 218.004, 65.0, 215.29, 139.78]
[EX A]:
119.274