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.

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

[-40.509, 201.39]
80.44

[149.875, 243.866, -97.256, -93.995, -24.761, 116.816, 78.857]

53.343

