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Problem 913

AMC 12 late, AIME early

Combinatorics Difficulty 4.0 Find the answer BMO Round 1 · United Kingdom · 2010

Isaac attempts all six questions on an Olympiad paper in order. Each question is marked on a scale from $0$ to $10$ . He never scores more in a later question than in any earlier question. How many different possible sequences of six marks can he achieve?

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