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: [223.951, 2.518, 140.336, -38.799, 217.497, 212.153, 21.874]

Answer: 111.361


Question: [-40.509, 201.39]

Answer: 80.44


Question: [-7.455, 5.485, 213.759, 90.438]

Answer:
75.557