丢硬币游戏,游戏开始有1000分,20%的概率丢出正面。丢正面不扣分,丢反面扣一分,那么�能丢多�次? 知乎 Template




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Try and sketch some of theseSunset, Palm tree, Alligator crocodile, Cable car, Stilts, Meatloaf, Corn, Wrench, Baseball mitt, Funeral, view more ideas


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tomski丢硬币游戏,游戏开始有1000分,20%的概率丢出正面。丢正面不扣分,丢反面扣一分,那么�能丢多�次? 知乎 coloring