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: [139.238, 225.164, -21.563, -22.339, -77.136, 96.772, -40.208, 121.974, 228.852]

Answer: 72.306


Question: [-3.302, 23.685, 69.661, 74.979, -46.96]

Answer: 23.613


Question: [193.651, -44.063, 48.228, 99.434, 4.309, 128.499, 206.99, 133.295, 57.908, 161.991]

Answer:
99.024