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TR-MO-R1 2017 Problem 17

    KARPUZ kelimesinin harfleri ile yazılabilecek olan tüm kelimelerin kaç tanesinde ya K, A’dan önce, ya da R, A’den sonra, ya da R, P’den öncedir? (Burada önce ya da sonra ifadeleri yan yana olmaları gerektiği anlamına gelmez)

    A) 696696 B) 690690 C) 660660 D) 600600 E) 580580

    Official text Turkish Mathematical Olympiad, first round 2017 official paper, page 11. Quoted with source.

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