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If C(2n,3):C(n,2)=12 :1 , find n:...

If C(2n,3):C(n,2)=12 :1 , find n:

A

3

B

5

C

6

D

4

Text Solution

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The correct Answer is:
B
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QUANTUM CAT-PERMUTATIONS & COMBINATIONS-QUESTION BANK
  1. ""^(17) Cr = ""^(17) C(r+3) find the value of r

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  2. ""^(7) P3 =n ""^(7)C3 find the value of n .

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  3. If C(2n,3):C(n,2)=12 :1 , find n:

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  4. what is the least possible value of n if : ""^(n-1)C3 +^(n-1...

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  5. If ""^n Cx=56 and ""^(n)Px = 336 find n and x .

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  6. What is the value of x when (11)Cx is maximum ?

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  7. What is the maximum value of (12)Cx for any natural number x ?

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  8. For what value of x, (14)Cx is maximum ?

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  9. How many different committes of 5 members may be formed 6 gentlemen an...

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  10. In a test paper there are 10 questions . Number of ways in which 6 que...

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  11. In a test paper there are total 10 questions. In how many different wa...

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  12. Droupdi has 5 friends. In how many ways can she invite one or more of ...

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  13. In how many ways can a committee of 6 members be formed from ...

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  14. A committee of 5 persons is to be formed from a group of a 6 gen...

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  15. A committee of 7 persons is to be chosen from 13 persons of whom ...

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  16. In how many ways can a committee of 4 men and 3 women be appointed fro...

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  17. In how many ways can a committee of 4 men and 3 women be appointed fro...

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  18. In how many ways 7 members forming a committee out of 11 be selected s...

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  19. In how many ways 7 members forming a committee out of 11 be selected s...

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  20. A committee of 3 experts is to be selected out of a panel of 7 persons...

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