AMC 10 Step by Step
2010 AMC 10BProblem 14P11-15~2 minPrint

The average of the numbers 1,2,3,,98,99,1, 2, 3,\cdots, 98, 99, and xx is 100x100x . What is xx ?

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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.