The number of four-digit numbers that can be formed using exactly the digits 1, 3, 3, 7 is less than 4!, because the two 3’s are indistinguishable. Prove that the number of permutations of n objects, m of which are alike, is n!/m!. Generalize to the case when are alike and others are alike.
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.