Ten different letters of an alphabet are given words with five letters are formed from these given letters. The number of words which have at least one letter repeated is

Ten different letters of an alphabet are given. Words with five letters are formed from these given letters.Determine the number4of words which have at least one letter repeated.

10 different letters of an alphabet are given. Words with 5 letters are formed from these given letters then the numbers of words which have atleast one letter represent is:

The different letters of the alphabet are given, Out of which five letter words are formed. Then the numbers of words in which at least one letter is repeated is

Find the number of 4 letter words that can be formed using the letters of the word ARTICLE in which at least one letter is repeated

Seven different letters are given.Then the number of ways in which words of 5 letters can be formed such that at least one of the letters is repeated is (a) 7Ps(c)57 (b) 14287 (d) 75