[中學] 排列組合 (不必分完)
23. 6個不同的玩具,裝入4個相同箱子,每箱不限個數,玩具可不裝完,共______
19. 6個不同的玩具,分給4個小朋友,每人最多1個,玩具可不分完,共
26. 6個相同的球,裝入4個相同箱子,每箱不限個數,球可不裝完,共________
9. 4個不同的玩具,裝入6個相同箱子,每箱不限個數,玩具可不裝完,共________
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