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Given the digits 3, 7, 6, 4 and 8. Seema...

Given the digits 3, 7, 6, 4 and 8. Seema is asked to form different numbers less than 1000 using the given digits If repetition of digits is not allowed, find the number of numbers formed by Seema

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Given the digits 3, 7, 6, 4 and 8. Seema is asked to form different numbers less than 1000 using the given digits If repetition of digits is allowed, find the number of numbers formed by Seema

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A N EXCEL PUBLICATION-PERMUTATIONS AND COMBINATIONS-QUESTION BANK
  1. How many 5-digit telephone numbers can be constructed using the digits...

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  2. Given the digits 0,1,2,3,4, 5,6,7, 8,9 Suppose Raju is asked to form 5...

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  3. Given the digits 3, 7, 6, 4 and 8. Seema is asked to form different nu...

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  4. Given the digits 3, 7, 6, 4 and 8. Seema is asked to form different nu...

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  5. Express (x+1)! interms of (x-1)!. Hence, solve the equation (x+1)! =1...

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  6. Express (2x+1)! in terms of (2x-1)!,(x+2)! in terms of (x-1)!.Hence,...

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  7. Write (2n)! =2n(2n-1)(2n-2) …3.2.1. Then combine the even factors and ...

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  8. Write (33)! = [32.16.8.4.2]. [33.31.30…3.1] Hence, prove that (33)! is...

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  9. Sumit goes to a movie. The cinema hall has two entrances and three exi...

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  10. In a class there are 25 boys and 10 girls. The teacher wants to select...

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  11. Given that p(n,r)=(n!)/((n-r)!) What are the values of P(5, r) and P(6...

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  12. If 5 xx 4Pr = 6 xx 5P(r-1) find 'r'.

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  13. Given that P(n, r)=n(n-1)(n-2)….to r factors What are the values of P(...

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  14. Given that P(n, r)=n(n-1)(n-2)….to r factors If P(n, 4) = 20 P(n, 2),...

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  15. Prove that ^9p5+5^9p4=(10!)/(5!)

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  16. If ^9p5+5^9p4=^10pr.prove that r=5

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  17. Prove that ""^(2n+1)P(n-1)=((2n+1)!)/((n+2)!) and ""^(2n-1)Pn=((2n-1)...

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  18. if ^(2n+1)p(n-1):^(2n-1)pn=3:5, prove that n = 4

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  19. In how many ways ‘n’ objects can be arranged together in a line?

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  20. For a group photograph, 3 boys and 2 girls stand in a line in all poss...

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