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: [80.346, 228.37, 18.978, -42.02]

A: 71.419
****
Q: [123.511, 37.811, 249.595, -25.324]

A: 96.398
****
Q: [30.691, 178.429, 144.808, 59.496]

A:
103.356
****