Okulonda abantu 4 mu kibinja kya 10

Waliwo engeri mmeka ez'okulonda abantu 4 mu kibinja kya 10? Ensengeka bw'eba ebalibwa, ezo ze permutation: $\displaystyle {}_nP_r$ ye kawandiiko aka kyenvu waggulu w'akapiira k'okukubisaamu. Wandiika 10, nyiga ne , wandiika 4, ne : 5040. Ensengeka bw'eba tebalibwa, ezo ze combination: $\displaystyle {}_nC_r$ eri waggulu w'akapiira k'okugabizaamu. Wandiika 10, nyiga ne , wandiika 4, ne : 210.

▶ Laba omutendera guno mu vidiyo (45:06)