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: [-13.67, 239.672]

Answer: 113.001


Question: [224.567, -42.213, 232.017]

Answer: 138.124


Question: [200.059, 99.343, -92.615, 112.717, 121.777, 163.537, 144.178, 193.189, 248.859, 171.337]

Answer:
136.238