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.
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Question: [30.224, 63.76, 96.876, 149.052, -38.974, 48.35, 133.493, 142.787, 10.958]

Answer: 70.725


Question: [220.903, 155.959]

Answer: 188.431


Question: [219.198, -79.178, 249.229, 118.464]

Answer:
126.928