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: [209.13, -12.632, 247.489, 55.492, 8.967, -90.158, 193.743]

SOLUTION: 87.433

PROBLEM: [-65.6, 214.501, -60.482, 183.69, 237.816]

SOLUTION:
101.985