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If ""^(n)C(3)=220, then n = ?...

If `""^(n)C_(3)=220`, then n = ?

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NEW JOYTHI PUBLICATION-PERMUTATIONS AND COMBINATIONS-QUESTIONS FROM COMPETITIVE EXAMS
  1. Evaluate the following: ""^(20)C(4)=

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  2. Let N be the number of quadratic equations with coefficients from {0, ...

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  3. If ""^(n)C(3)=220, then n = ?

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  4. A polygon has 54 diagonals. Number of sides of this polygon is

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  5. In how many ways can 8 students be arranged in a row?

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  6. The number of different permutations of the word word 'BANANA' is

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  7. Rank of the word " MOTHER " is

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  8. Six X's have to be placed in the squares of the figure below, such tha...

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  9. A student is to answer 10 out of 13 questions in an examination such t...

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  10. The value of sum(n=1)^(oo)(""^(n)C(0)+.......+""^(n)C(n))/(""^(n)P(n))

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  11. Evaluate the following: ""^(20)C(1)=

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  12. The number of triangles which can be formed by using the vertices of a...

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  13. Evaluate the following: ""^(15)C(2)=

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  14. The number of ways in which 21 objects can be grouped into three group...

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  15. Evaluate the following: ""^(105)C(0)=

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  16. Evaluate the following: ""^(10)C(3)=

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  17. The number of permutations of the letters of the word 'CONSEQUENCE' in...

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  18. If n = 5, then (""^(n)C(0))^(2)+(""^(n)C(1))^(2)+(""^(n)C(2))^(2)+.......

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  19. Let n be a natural number. Then the range of the function f(n)=""^(8...

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  20. The number of ways in which 5 ladies and 7 gentlemen can be seated in ...

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