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]: [-38.715, 205.647, 66.034, 49.8, -92.051, 111.017, 149.689]
[EX A]: 64.489

[EX Q]: [-31.252, 246.934, 96.512, 19.356, -50.759, 134.528, 176.914, 17.007, 171.802]
[EX A]: 86.782

[EX Q]: [207.476, -80.931, -15.605, -15.357, 173.462, -61.739, 249.542, -96.57, -46.58]
[EX A]:
34.855