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: [245.271, 40.965, 133.913, 212.104]

SOLUTION: 158.063

PROBLEM: [113.238, 247.072, -31.448, -33.563, 74.519, 67.841]

SOLUTION: 72.943

PROBLEM: [-30.053, -38.855, 221.016, -4.563, -42.383, 194.358, 174.21, 99.965, 224.828, 246.88]

SOLUTION:
104.54