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: [9.828, 248.054, 20.871, 99.749, 52.797, -86.856, 65.438, 53.627]

SOLUTION: 57.939

PROBLEM: [217.301, 19.358, -21.02, -51.249]

SOLUTION: 41.098

PROBLEM: [138.52, -19.393, -51.637, 20.032, 246.008, 181.288]

SOLUTION:
85.803