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: [21.953, -90.519, 92.624, 189.808, 130.57, -33.423, -16.126, 31.61, 119.582]

SOLUTION: 49.564

PROBLEM: [223.847, 115.483, 148.407, -44.824, 99.251, 36.833, -45.949]

SOLUTION: 76.15

PROBLEM: [71.91, 41.513]

SOLUTION:
56.712