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: [120.682, 53.847]

SOLUTION: 87.264

PROBLEM: [245.271, 40.965, 133.913, 212.104]

SOLUTION: 158.063

PROBLEM: [192.154, 14.43, 239.993, 1.782, 89.479, 187.436, 219.279, 93.835]

SOLUTION:
129.798