Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
[1,3,5]
Solution: 3.000
Reason: The mean of the input list is (1+3+5)/3, which equals 3. This is a good example.

Now, solve this instance: [247.48, 19.393, 130.942]
Student:
132.605