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Scale-of-evaluation / daily-question

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【09.09】有规格尺寸相同的6种颜色的袜子各20只混装在黑箱内，从中至少取出多少只才能保证有3双同色的袜子？ #291

Open Derek-94tm opened 3 years ago

Derek-94tm commented 3 years ago

请在下方作答。