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: [21.723, 130.05, 75.095]

Answer: 75.623


Question: [219.336, -29.108, -41.612, 105.709]

Answer: 63.581


Question: [-15.064, 239.128, 247.615]

Answer:
157.226