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]: [153.482, 150.917]
[EX A]: 152.2

[EX Q]: [227.404, 94.456, 233.241, 147.762, -31.667, -62.22, -93.912]
[EX A]: 73.581

[EX Q]: [9.625, -27.168, -78.835, 117.698, -73.784, 146.253, -90.405, 134.54, 55.581, 205.402]
[EX A]:
39.891