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.

[EX Q]: [155.513, 206.938, 235.799]
[EX A]: 199.417

[EX Q]: [227.874, 175.626, 193.094, 63.963, 139.938]
[EX A]: 160.099

[EX Q]: [120.623, 69.374, 47.751, 121.126, -98.66, -52.379, 172.802, -65.776, 164.938, -35.405]
[EX A]:
44.439