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: [139.6, 119.652, 135.338, 171.029, 247.554, 222.19, -61.931, 120.928, 235.688]

Answer: 147.783


Question: [138.602, 158.458, 241.327, 194.509, 169.45, -56.151]

Answer: 141.032


Question: [73.331, 85.459, 59.798, -35.019]

Answer:
45.892