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In how many ways can 6 persons stand in a queue?

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RD SHARMA ENGLISH-PERMUTATIONS-All Questions
  1. If P(n ,4)=20xxP(n ,2), then find the value of n

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  2. If P(n ,4)=20 x P(n ,2),find n.

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  3. In how many ways can 6 persons stand in a queue?

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  4. Seven athletes are participating in a race. In how many ways can the ...

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  5. If 22P(r+1):^(20)P(r+2)=11 : 52 ,find r

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  6. If 2n+1P(n-1) : (2n-1)Pn =3:5,find n

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  7. Find the number of arrangements of the letters of the INDEPENDENCE. ...

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  8. In how many ways can the letters of the word PENCIL be arranged so tha...

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  9. How many 4-letter word, with or without meaning, can be formed out of ...

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  10. If Pm stands for ^m Pm , then prove that: 1+1. P1+2. P2+3. P3++ndotPn=...

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  11. In an examination hall there are four rows of chairs. Each row has 8 c...

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  12. The sum of all four-digit numbers that can be formed by using the d...

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  13. If P(15 ,r-1): P(16 ,r-2)=3:4 , find rdot

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  14. If "^(n+5)P(n+1)=(11(n-1))/2"^(n+3)Pn , find ndot

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  15. How many words, with or without meaning, can be formed by using the ...

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  16. If a denotes the number of permutations of (x+2) things taken all at a...

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  17. In how many ways can 9 examination papers arranged so the best and the...

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  18. How many words can be formed with the letters of the words ‘ORDINATE’ ...

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  19. A code word is to consist of two distinct English alphabets followed b...

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  20. In how many ways can 5 children the arranged in a row such that two of...

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