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]: [248.089, 9.064, -69.315, -16.093, 95.107, -73.12, 175.054, 52.865, 95.009]
[EX A]: 57.407

[EX Q]: [-17.106, 23.8, -54.195, 233.82, -99.732, -68.488, 215.616]
[EX A]: 33.388

[EX Q]: [84.218, 124.752]
[EX A]:
104.485

