The different letters if alphabet are given. Words with 5 letters are formed from these given letters. Then the number of words which have at least one letter repeated is
Solve correctly and also fast plz....
Answers
Answered by
0
Answer:
Words with 5 letters are formed from these given letters, then the number of words which have at least one letter repeated is. (a) 69760. (b) 30240.
Answered by
1
Required number of words = Total number of words - Total number of words in which no letter is repeated
=10
5
−
10
P
5
=1000000−10×9×8×7×6
=1000000−30240
=69760
Similar questions