Permutations Combinaisons Arrangements . If we choose m elements from n without any order, it is a combination. X m} as in this example of the most common lotto game in the world: Permutations & combinations from www.slideshare.net Les permutations, les combinaisons et les arrangements. On entend par permutation de n éléments. For example, the combination of 2 from 3 is ав.