Home
Class 14
MATHS
If ^n+2C8:^(n-2)P4: 57 : 16 , find ndot...

If `^n+2C_8:^(n-2)P_4: 57 : 16 ,` find `ndot`

A

20

B

19

C

18

D

17

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • PERCENTAGE

    UPKAR PUBLICATION |Exercise QUESTION BANK|120 Videos

  • PIPES AND CISTERNS

    UPKAR PUBLICATION |Exercise QUESTION BANK |46 Videos

Similar Questions

Explore conceptually related problems

If .^(n+2)C_(8):^(n-2)P_(4)::57:16, find n

If ^(n+2)C_(8)*^(n-2)P_(4)=57:16,f in dn

If .^(n+2)C_(8) : ^(n-2)P_(4)=57:16 , then the value of (n)/(2) is

(i) If ""^(n)P_(4): ""^(n)P_(5)=1:2 , find n. (ii) If ""^(n-1)P_(3): ""^(n+1)P_(3)=5:12 , find n.

If .^(n)C_(8)=.^(n)C_(6) , then find .^(n)C_(2) .

If ^(n)C_(8)=^(n)C_(6), then find ^(n)C_(2)

If .^(n)C_(12) = .^(n)C_(16) , find the value of n

UPKAR PUBLICATION -PERMUTATION AND COMBINATION-QUESTION BANK
  1. A polygon has 44 diagonals. The number of its sides is

    Text Solution

    |

  2. If 7 points out of 12 are in the same straight line, then what is the ...

    Text Solution

    |

  3. If ^n+2C8:^(n-2)P4: 57 : 16 , find ndot

    Text Solution

    |

  4. Everybody in a room shakes hands with everybody else. The total number...

    Text Solution

    |

  5. If ^(56)P(r+6):^(54)P(r+3)=30800 :1, find r.

    Text Solution

    |

  6. IF ""^n C(r-1)=36, ""^nCr=84, "^n C(r+1)=126 then (n,r) is equal to

    Text Solution

    |

  7. If .^(35)C(n+7)=.^(35)C(4n-2) then find the value of n.

    Text Solution

    |

  8. IF ""^(2n+1)P(n-1):"^(2n-1) Pn=3:5 then n is equal to

    Text Solution

    |

  9. The value of oversetnoverset Sigma overset(r=1)^(nPr/r!)is-

    Text Solution

    |

  10. If^nPr=720^nCrthan the value r is-

    Text Solution

    |

  11. If S = {2, 3, 4, 5, 7, 9}, then the number of different three-digit nu...

    Text Solution

    |

  12. The number of triangles that can be formed by choosing the vefrom a se...

    Text Solution

    |

  13. The middle term of [2x-(1)/(3x)]^(10) is -

    Text Solution

    |

  14. The number of ways in which 5 boys and 5 girls can sit in a ring are--...

    Text Solution

    |

  15. How many words of 4 consonants and 3 vowels is can be made from 12 con...

    Text Solution

    |

  16. If ^nPr=120^nCr then r is equal to-

    Text Solution

    |

  17. 12 persons are to be arranged to a round table. If two particular pers...

    Text Solution

    |

  18. Seven wormen and seven men are to sit round a circular table such that...

    Text Solution

    |

  19. The total number of permutations of 4 letters that can be made out of ...

    Text Solution

    |

  20. The total number of selections of fruit which can be made from 3 banan...

    Text Solution

    |