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: [-73.074, 87.743, 221.875, 126.604, 31.513, 196.863]

Answer: 98.587


Question: [131.164, 99.999, 138.488, 57.264, -40.069, -82.402, -42.836]

Answer: 37.373


Question: [164.897, 121.681, 158.263]

Answer:
148.28