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SIA PUBLICATION-PERMUTATIONS AND COMBINATIONS -Problems
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- ""^(n) C(r-1) = 330 ,""^(n)C(r)=462 , ""^(n)C(r+1) = 462 implies r=
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- A regular polygon of n sides has170 digonals . Then n=
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- underset(k=1)overset(oo)sum underset(r=0)overset(k)sum (1)/(3^(k))(""^...
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- A bag contains n white and n black balls . Pairs of balls are ...
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- the number of five digit numbers divisible by 5 that can be for...
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- ""^(15)P(8)=A+8.""^(14)P(7 )implies A=
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- If ""^((n+1))C(3)+""^((n-1))C(4)gt""^(n)C(3), then the minimum value o...
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- Let n=1! +4! +7! +. . . +400 ! then ten's digit of n is
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- Let a(n)=(10^(n))/(n!) for n = 1, 2, 3,… then the greatest value of n ...
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- A polygon has 14 diagonals. Then, the number of its sides is
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