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: [229.461, -89.251, 170.954]

Answer: 103.721


Question: [1.222, 33.339, 163.969]

Answer: 66.177


Question: [104.617, 66.885, 222.557, -9.248, 30.932]

Answer:
83.149