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: [21.531, 221.161, -31.194]

A: 70.499
****
Q: [112.026, 20.03, 73.595, -24.957, 185.718, 36.43, 206.024]

A: 86.981
****
Q: [62.987, -87.389, 104.017]

A:
26.538
****