TASK DEFINITION: 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.
PROBLEM: [233.742, -71.075]

SOLUTION: 81.333

PROBLEM: [-20.702, 4.455, 37.838, 102.751, 231.6, -23.075, 236.527, 227.109, 171.708, 46.239]

SOLUTION: 101.445

PROBLEM: [69.721, 116.583, 63.325, -2.991, -54.502, -56.366, 169.392, 172.724, 185.307]

SOLUTION:
73.688