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: [176.017, -45.57]

Answer: 65.224


Question: [91.043, -73.625, 209.433]

Answer:
75.617