Test my Merit My Results Create Exam

Combinatorics | Permutations

How many words can be formed with the letters of the word 'POSTMAN', if every word begins with T and ends with M?
How many 3 digit numbers can be formed using the numbers 6, 1, 2, 3 without repetition ?
The permutations of {a, b, c, d, e, f, g} are listed in lexicographic order. Which of the following permutations are just before and just after the permutation bacdefg?
Ads