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How many 3-digit numbers can be formed f...

How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that repetition of the digits is not allowed?

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How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that repetition of the digits is allowed?

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JBD PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXAMPLE
  1. Out of 18 points in a plane, no three are in the same straight line ex...

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  2. How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and ...

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  3. How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and ...

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  4. If (n!)/(2!(n-2)!):(n!)/(4!(n-4)!) =2:1. Find the value of n.

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  5. show that 2^16 divides 32!. also, find the largest value of n for whic...

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  6. What is the largest power of 2 contained in 32!.

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  7. How many different words (with or without meaning) can be formed using...

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

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

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

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

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

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

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

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  15. How many words can be formed by using the letters of the word 'ORIENTA...

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

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

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

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

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

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