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: [120.236, 116.311, -13.268]

SOLUTION: 74.426

PROBLEM: [14.166, 216.734, -23.073, 209.811, 203.336, 91.659, 142.602, 1.151, -39.869, -54.838]

SOLUTION: 76.168

PROBLEM: [242.823, -39.827, 72.63, 185.81, 163.766]

SOLUTION:
125.04