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: [53.391, 118.782, 102.742]

Answer: 91.638


Question: [-27.872, -9.249, 218.646, -32.0, 49.715, 58.225, 118.489, 29.679, 31.407]

Answer: 48.56


Question: [217.455, 225.012, 36.027, 182.967, 106.922]

Answer:
153.677