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: [-64.231, 200.235, -9.547, -98.817, 222.577, 12.8, 214.705, 122.883, 216.246, 113.126]

Answer: 92.998


Question: [20.538, 100.835, -23.197, 207.707, -12.758, 152.97, 190.404]

Answer: 90.928


Question: [-31.577, 108.924, -86.391]

Answer:
-3.015