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: [21.531, 221.161, -31.194]

Answer: 70.499


Question: [-44.471, 208.445, 208.318, -34.134]

Answer: 84.54


Question: [69.958, -95.132, 3.101, -82.932, -24.957, 69.445, 147.916]

Answer:
12.486