Detailed Instructions: 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.
Q: [31.144, 125.262, 172.518, 35.668, -89.2, 68.261, -53.655]
A:
41.428