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: [207.165, 246.399, 44.821, -21.671]

Answer: 119.178


Question: [58.371, 4.131]

Answer: 31.251


Question: [-86.317, 142.633, 240.833]

Answer:
99.05