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: [109.74, 169.0, 195.864, -1.043, 51.968, -56.564, 214.711, -78.61, 212.459, 228.74]

Answer: 104.626


Question: [-20.289, -75.285, 177.907]

Answer:
27.444