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: [66.037, 30.958, 124.853]

SOLUTION: 73.949

PROBLEM: [148.261, -51.308, -98.748, -41.832, 44.313, -41.042, -19.943]

SOLUTION: -8.614

PROBLEM: [-78.906, 119.863, 44.561, 1.523]

SOLUTION:
21.76