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: [162.26, 79.268]

SOLUTION: 120.764

PROBLEM: [184.51, 79.649, 31.606, -65.279, 1.231]

SOLUTION: 46.343

PROBLEM: [-60.51, 158.182, -1.215, 246.77, -40.406]

SOLUTION:
60.564