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]: [125.67, 5.514, 161.93, 107.05, 118.949, 233.815, 230.211]
[EX A]: 140.448

[EX Q]: [21.531, 221.161, -31.194]
[EX A]: 70.499

[EX Q]: [-43.086, 32.505, 185.19, -13.574, 163.145, 176.927, 22.859, -33.324, -48.236]
[EX A]:
49.156