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ten different letters of alphabet ar...

ten different letters of alphabet are given . Words with 5 letters are formed from these given letters than the number of words which have at least one letter repreated is

A

69760

B

30240

C

99748

D

none

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The correct Answer is:
A
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DIPTI PUBLICATION ( AP EAMET)-PERMUTATIONS & COMBINATIONS-EXERCISE 1A (PERMUTATIONS )
  1. A three digit number n is such that the last two digits of it ...

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  2. Eight different letters of an alphabet are given . Words of f...

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  3. ten different letters of alphabet are given . Words with 5 lett...

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  4. The number of four letter words using the letters of the word ...

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  5. The number of 4 letter words that can be formed with the letters in th...

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  6. The number of four digits telephone numbers having atleast one ...

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  7. The number of number between 1 and 10 ^(10) which contain the d...

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  8. The number of three digits number of the form xyz with x lt y, z...

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  9. A telegraph post has 5 arms . Each arm is capable of four disti...

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  10. There are 3 candidates for a professorship and one is to electe...

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  11. A guardian with 5 wards wishes everyone of them to study eith...

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  12. 3 letters are to be posted in 5 letter boxes in a part of the ...

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  13. Each of the five questions in a multiple choice test has 4 p...

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  14. The number of ways in which 7 distinct toys can be distributed ...

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  15. The number of ways that five prizes can be given to 4 boys , wh...

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  16. The number of ways in which 10 letters can be posted in 5 letter boxe...

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  17. The number of ways of wearing 6 different rings to 5 hands is

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  18. The number of functions that can be defined from a set containi...

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  19. The numbers of the one one function that can be defind from A ={...

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  20. The number of one one functions that can be defined from {1, 2, 3, 4}...

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