This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Permutationen bsp. File Permutations with repetition svg en Reduction of the number of permutations if the original is split into classes of indistinguishable objects de Reduktion der Zahl der Permutationen bei Unterteilung der Ausgangsmenge in Klassen ununterscheidbarer Objekte own Qniemiec Cczero Permutations of elements Multisets