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

SOLUTION: 87.433

PROBLEM: [-81.432, -63.059, 150.144, 55.203, 215.405, -89.797, 72.946]

SOLUTION: 37.059

PROBLEM: [109.109, -95.395, 5.04, 45.497, 56.443, -72.916]

SOLUTION:
7.963