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: [245.466, 19.262, 199.878]

SOLUTION: 154.869

PROBLEM: [45.112, 147.024, -15.583, 33.655, -60.031]

SOLUTION: 30.035

PROBLEM: [208.872, 59.574, 135.88, 152.251, -54.975, 116.537, 67.641]

SOLUTION:
97.969