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: [102.524, 88.129, 196.972]

SOLUTION: 129.208

PROBLEM: [93.433, 148.366, 19.269]

SOLUTION: 87.023

PROBLEM: [61.413, 78.605, 80.788, 185.916, -74.896, 220.309]

SOLUTION:
92.022