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: [116.074, 213.452, 86.981]

Answer: 138.836


Question: [171.439, 0.981, 42.253, 239.995, 129.938, -67.125, -69.565, -53.374, -51.357]

Answer: 38.132


Question: [-95.341, -24.108, 6.623]

Answer:
-37.609