Discrete mathematics
Combinatorics
Factorials, permutations, arrangements and combinations.
Discrete mathematics
Permutations with repetition
P = n!/(n₁!n₂!…)→Discrete mathematicsFactorial
n! = 1·2·…·n→Discrete mathematicsNumber of permutations
Pₙ = n!→Discrete mathematicsArrangements without repetition
Aₙᵏ = n!/(n−k)!→Discrete mathematicsCombinations without repetition
Cₙᵏ = n!/[k!(n−k)!]→Discrete mathematicsSequences with repetition
N = nᵏ→Discrete mathematicsCombinations with repetition
C(n+k−1,k)→Discrete mathematicsCircular permutations
Pcircle = (n−1)!→