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: [-6.992, -36.177, -95.203, 87.142]

Answer: -12.808


Question: [244.142, 233.163, 129.146, 103.193, -55.34]

Answer:
130.861