AMC 10 Step by Step
2018 AMC 10BProblem 6P1-10~2 minPrint

A box contains 55 chips, numbered 1,2,3,4,1, 2, 3, 4, and 55 . Chips are drawn randomly one at a time without replacement until the sum of the values drawn exceeds 44 . What is the probability that 33 draws are required?

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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.