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Find n if "^(n-1)P3 : "^nP4 =1:9....

Find n if `"^(n-1)P_3 `: `"^nP_4 =1:9`.

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Find n if ""^(n-1)P_(3) : ""^(n)P_(4) = 1:16 .

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Find n if "^nP_4 = 20 ^nP_2 .

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PSEB-PERMUTATIONS AND COMBINATIONS-EXERCISE
  1. Find the number of 4-digit numbersthat can be formed using the digits ...

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  2. From a committee of 8 persons, in how many ways can we choose a chairm...

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  3. Find n if "^(n-1)P3 : "^nP4 =1:9.

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  4. Find r if "^5Pr =2 "^6P(r-1).

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  5. Find r if "^5Pr = "^6P(r-1).

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  6. How many words, with or without meaning, can be formed using all the l...

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  7. How many words, with or without meaning can be made from the letters o...

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  8. How many words, with or without meaning can be made from the letters o...

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  9. How many words, with or without meaning can be made from the letters o...

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  10. In how many of the distinct permutations of the letters in MISSISSIPPI...

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  11. In how many ways can the letters of the word PERMUTATIONS be arranged ...

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  12. In how many ways can the letters of the word PERMUTATIONS be arranged ...

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  13. In how many ways can the letters of the word PERMUTATIONS be arranged ...

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  14. If "^nC8 = "^nC2 , find "^nC2 .

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  15. Determine n if "^(2n)C3 : "^nC3 =12:1

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  16. Determine n if "^(2n)C3 : "^nC3 = 11 : 1

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  17. How many chords can be drawn through 21 points on a circle?

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  18. In how many ways can a team of 3 boys and 3 girls be selected from 5 b...

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  19. Find the number of ways of selecting 9 balls from 6 red balls, 5 white...

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  20. Determine the number of 5 card combinations out of a deck of 52 cards ...

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