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.

[EX Q]: [17.197, 152.985, 73.815]
[EX A]: 81.332

[EX Q]: [114.041, 53.494, 14.751, -0.392, -70.081, 116.8, 1.044, -50.731]
[EX A]: 22.366

[EX Q]: [72.011, 86.41, 177.559, 88.373, 52.344, 231.761, 164.181]
[EX A]:
124.663