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]: [231.74, 142.135, 60.231, -34.154, 111.503, -84.615, 186.711, 52.235, 43.888, -20.096]
[EX A]: 68.958

[EX Q]: [-47.309, -46.076, 191.14, -6.032, 4.858]
[EX A]: 19.316

[EX Q]: [122.019, 224.995, 44.344, -79.704]
[EX A]:
77.914