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- How many 5-digit telephone numbers can be constructed using the digits...
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- Given the digits 0,1,2,3,4, 5,6,7, 8,9 Suppose Raju is asked to form 5...
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- Given the digits 3, 7, 6, 4 and 8. Seema is asked to form different nu...
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- Given the digits 3, 7, 6, 4 and 8. Seema is asked to form different nu...
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- Express (x+1)! interms of (x-1)!. Hence, solve the equation (x+1)! =1...
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- Express (2x+1)! in terms of (2x-1)!,(x+2)! in terms of (x-1)!.Hence,...
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- Write (2n)! =2n(2n-1)(2n-2) …3.2.1. Then combine the even factors and ...
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- Write (33)! = [32.16.8.4.2]. [33.31.30…3.1] Hence, prove that (33)! is...
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- Sumit goes to a movie. The cinema hall has two entrances and three exi...
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- In a class there are 25 boys and 10 girls. The teacher wants to select...
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- Given that p(n,r)=(n!)/((n-r)!) What are the values of P(5, r) and P(6...
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- If 5 xx 4Pr = 6 xx 5P(r-1) find 'r'.
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- Given that P(n, r)=n(n-1)(n-2)….to r factors What are the values of P(...
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- 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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- Prove that ^9p5+5^9p4=(10!)/(5!)
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- If ^9p5+5^9p4=^10pr.prove that r=5
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- Prove that ""^(2n+1)P(n-1)=((2n+1)!)/((n+2)!) and ""^(2n-1)Pn=((2n-1)...
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- if ^(2n+1)p(n-1):^(2n-1)pn=3:5, prove that n = 4
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- In how many ways ‘n’ objects can be arranged together in a line?
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- For a group photograph, 3 boys and 2 girls stand in a line in all poss...
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