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: [2.81, 52.99, 55.279, 75.682, 73.835, 148.077, -54.162, 112.112]

SOLUTION: 58.328

PROBLEM: [30.7, 241.916, 245.677, -26.708, 212.446, 81.786, 208.412, 237.096, 155.359]

SOLUTION: 154.076

PROBLEM: [-75.264, -61.515, 132.024, 121.639, 116.464, 69.691, -19.225, 193.734, 127.735, 230.003]

SOLUTION:
83.529