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: [21.953, -90.519, 92.624, 189.808, 130.57, -33.423, -16.126, 31.61, 119.582]

Answer: 49.564


Question: [108.26, -20.681, 127.479, -29.352]

Answer: 46.426


Question: [217.166, 115.156, -10.911, 183.125, -16.943, 175.079, 108.195, -38.436, 26.241]

Answer:
84.297