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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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JBD PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXAMPLE
  1. How many different words (with or without meaning) can be formed using...

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  2. Find the value of n such that ""^nP5 = 42 ""^nP3,,n gt 4.

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

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

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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 can be formed by using the letters of the word 'ORIENTA...

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  11. There are three prizes to be distributed among 6 students. In how many...

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  12. There are three prizes to be distributed among 6 students. In how many...

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

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  14. In how many ways can be letters of word 'ASSASSINATION' be arranged so...

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  15. How many different words, with or without meaning can be formed by usi...

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  16. How many different words, with or without meaning can be formed by usi...

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  17. How many different words can be formed by using the letters of the wor...

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  18. How many different words can be formed by using the letters of the wor...

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  19. A committee of 7 has to be formed from 9 boys and 4 girls. In how many...

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