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: [99.278, 72.353, -21.292]

Answer: 50.113


Question: [-24.857, -28.799, 240.99]

Answer: 62.445


Question: [-67.633, 30.928, -58.604, 217.142, 103.557, -18.884]

Answer:
34.418