malai kai tha xaina3521457269026422
The answer is C. You would use MEAN because it gives you the average although it doesn't always have to be a whole number. Therefore despite that one student performing badly won't affect the rest of the class.
Again hope this helps : )
C.
The negative (-) means that you are losing 17 of something.
in I and II you are also losing 17 things. I you are losing 17 dollars and II you are losing 17 yards. III, however, you are gaining 17 degrees so it is not the answer.