3! = 1 x 2 x 3 = 6
4! = 1 x 2 x 3 x 4 = 24
∴ 3! + 4! = 6 + 24 = 30
7! = 1 x 2 x 3 x 4 x 5 x 6 x 7 = 5040
∴ 3! + 4! ≠ 7!
How many possible words can be created from the letters R, A, N, D (with repetition)?
Permutation is the method or the act of arranging members of a set into an order or a sequence.
Combination is the method of forming subsets by selecting data from a larger set in a way that the selection order does not matter.