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: [231.057, 71.527, 201.799, -5.17, -14.963, -35.693]

SOLUTION: 74.76

PROBLEM: [49.035, -81.115, 27.419]

SOLUTION: -1.554

PROBLEM: [123.361, -10.351, 34.114, 51.776]

SOLUTION:
49.725