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: [-20.155, -42.404]

Answer: -31.28


Question: [89.776, -37.895, -45.315, 75.805, 144.052, 150.156]

Answer: 62.763


Question: [102.812, 153.583]

Answer:
128.197