Finally, here is a real life word word problem. During the Fall of 2006, in Exam 2 of Math 1010-1 (our class), 199 people took the exam and received an average score of 62%. 84 people did not pick up their exam, presumably because they did not attend class on the day the exam was handed back. Those people had an average score of 58%. Thus the people who did pick up their exams, and presumably did attend class, had an average score of %. (Round your answer to the nearest integer.)

Of course, assuming attendance on a particular day is correlated with attendance in general, the moral of the story is that it pays to come to class. I would have liked to see this case made more forcefully, but the above are the actual figures.