Balls Bins unrestricted ≤1≥1 unlabeled unlabeled labeled unlabeled unlabeled labeled labeled labeled Table:The Twelvefold Way (Balls into Bins Model). labeled us.unlabeled Hengfeng Wei (hfweixinju.edu.cn) 2-3 Counting March12,202014/34Balls Bins unrestricted ≤ 1 ≥ 1 unlabeled unlabeled labeled unlabeled unlabeled labeled labeled labeled Table: The Twelvefold Way (Balls into Bins Model). labeled vs. unlabeled Hengfeng Wei (hfwei@nju.edu.cn) 2-3 Counting March 12, 2020 14 / 34