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: [-17.141, 203.132, -6.872, 155.222, -99.642]

SOLUTION: 46.94

PROBLEM: [233.848, -58.713, 126.623, 27.615, 62.365, 200.239, 13.38]

SOLUTION: 86.48

PROBLEM: [19.459, 126.417, -64.212, 141.708, -51.394, 141.301, -64.733]

SOLUTION:
35.507