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Match the following {:("List-I","List-...

Match the following
`{:("List-I","List-II"),((I)""^(n)C_(r+1)+2""^(n)C_(r)+""^(n)C_(r-1),(a)""^((n+2))C_(r+1)),((II)""^((n+1))C_(3)-""^(n-1)C_(3),(b)(n-1)^(2)),((III)""^(2n)C_(2)-2""^(n)C_(2),(c)n^(2)),(,(d)""^(n+1)C_(r+1)):}`
The correct match is

A

a,b,c

B

b, c, d

C

c, d, b

D

d, c, a

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-EXERCISE-II
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  8. In a polygon, no three diagonals are con current. If the total no. of ...

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  9. A is a set containing n elements. A subset P of A is chosen. The set A...

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  10. A is a set containing n elements. A subset P of A is chosen. The set A...

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  11. A is a set containing n elements. A subset P of A is chosen. The set A...

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  12. There are 10 intermediate stations on a railway line between two parti...

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  13. No.of divisors of the form 4n+2(nge0) of the integer 240 is

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  14. The number of ways in which 6 things can be divided Statement-I: in...

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  15. IF a,b,c be the number of positive integral integral divisors o...

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  16. Match the following {:("List-I","List-II"),((I)""^(n)C(r+1)+2""^(n)C...

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  17. Assertion (A) : If 5 parallel lines intersect 4 parallel lines, then t...

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  18. Assertion (A) : The number of positive integral solutions of x(1)+x(2)...

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  19. There are two ums. Um A has 3 distinct red balls and um B has 9 distin...

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  20. Statement -1 the number of ways of distributing 10 identical ball...

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