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2014 AMC 10AProblem 5P1-10~2 minPrint
Statistics & DataRatios, Percents & AveragesSet up the equation/formula and compute; no special trick needed

On an algebra quiz, 10%10\% of the students scored 7070 points, 35%35\% scored 8080 points, 30%30\% scored 9090 points, and the rest scored 100100 points. What is the difference between the mean and median score of the students' scores on this quiz?

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Problem © Mathematical Association of America (MAA), American Mathematics Competitions. Reproduced for non-commercial educational use. Solution and commentary are original to this site.