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: [38.343, 177.478, 120.174, -74.923, 98.159]

SOLUTION: 71.846

PROBLEM: [147.664, 167.561, 244.106, -42.988, 9.425, 79.806, 239.58]

SOLUTION: 120.736

PROBLEM: [198.164, 203.443, 137.014]

SOLUTION:
179.54