The permutation rule is used when selecting a certain number of objects from a larger set. In the case where r objects are being selected from a set of n objects, the number of permutations is nPr = n!/(n-r)!.
The permutation rule is used when selecting a certain number of objects from a larger set. In the case where r objects are being selected from a set of n objects, the number of permutations is nPr = n!/(n-r)!.