Huruf ABC harus selalu muncul bersama


Soal :

Berapa banyak permutasi dari huruf ABCDEF jika huruf ABC harus selalu muncul bersama?


 

Jawab:

ABCDEF

Huruf ABC harus selalu muncul bersama à dihitung 1

Total unsur = 4

Banyak permutasi = 4 * 3 * 2 * 1 = 24 cara.

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