I only require the explanation, not the answer.

The children in a class state how many children there are in their family.
The numbers they state are given below: 1, 2, 1, 3, 2, 1, 2, 4, 2, 2, 1, 3, 1, 2, 2, 2, 1, 1, 7, 3, 1, 2, 1, 2, 2, 1, 2, 3

So the question that I do not understand is:
Which is the most sensible average to use in the case.

The person with the most through explanation will get brainliest and will get awarded 75 points!