Well, for that, we just have to add up the scores on the final exams and then divide by the number of scores we have. So we might be able to do that in our heads. Let's see. Well, let me just write it over here. So we have 100 plus 100 plus 100 plus 75 plus 80. So all of that divided by 5, that'll give us our average. If someone tells you average without giving more information, they're probably talking about the arithmetic mean.