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]: [-46.113, 125.487, 133.801, 230.957, 217.606, 147.203, -27.73, 66.455, -96.494]
[EX A]: 83.464

[EX Q]: [54.715, 180.963, 239.308, 175.084, 147.044, 136.262, 184.009]
[EX A]: 159.626

[EX Q]: [187.767, 50.187, 134.284]
[EX A]:
124.079