Question

what is permutation and combination​

Answer 1

Answer:

Permutations and combinations, the various ways in which objects from a set may be selected, generally without replacement, to form subsets. ... This selection of subsets is called a permutation when the order of selection is a factor, a combination when order is not a factor.

Step-by-step explanation:

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Answer 2

Answer:

A permutation is an arrangement of all or part of a set of objects, with regard to the order of the arrangement.

Combinations refer to the combination of n things taken k at a time without repetition. To refer to combinations in which repetition is allowed, the terms k-selection, k-multiset, or k-combination with repetition are often used.