Question

Determine whether the following problem involves a permutation or combination.​ (It is not necessary to solve the​ problem.) How many different 33​-letter passwords can be formed from the letters Upper QQ​, Upper RR​, Upper SS​, Upper TT​, Upper UU​, Upper VV​, and Upper WW if no repetition of letters is​ allowed?

Answer 1

Permutation

Explanation:

Since we are talking about passwords the order of the letters matters, i.e, the pasword UpT is different to the pasword pUT. Therefore, the problem involves all the permutations of 33 letters, from the given letters, where no repetitions of letters are allowed.