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: [159.965, 172.082]

SOLUTION: 166.024

PROBLEM: [185.594, 89.215, 19.941, 23.299, 47.251]

SOLUTION: 73.06

PROBLEM: [189.535, 137.888, 71.631, 36.796, 200.799, 114.517]

SOLUTION:
125.194