Ten different letters of an alphabet are given, words with five letters are formed form these given letters. Then the number of words which have at least one letter repeated is

Ten different letters of an alphabet are given, words with five letter

1.	Ten different letters of an alphabet are given, words with five letters are formed form these given letters. Then the number of words which have at least one letter repeated is
A.	69760
B.	30240
C.	99784
D.	None of these
Answer» B. 30240

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Ten different letters of an alphabet are given, words with five letters are formed form these given letters. Then the number of words which have at least one letter repeated is

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