Home
Class 12
MATHS
If n+2C(8):n-2P(4)=57:16 then the value ...

If `n+2C_(8):n-2P_(4)=57:16` then the value of 'n' is

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

  • PARABOLA

    HIMALAYA PUBLICATION|Exercise QUESTION BANK|233 Videos

  • PROBABILITY

    HIMALAYA PUBLICATION|Exercise QUESTION BANK|213 Videos

Similar Questions

Explore conceptually related problems

If ""^(n)P_(4) = 24^(n)C_(5) then the value of n=

If .^(20)C_(n+1) = ^ (n) C_(16) , then the value of n is

If .^(2n)C_(3):^(n)C_(3)=11:1 , find the value of n.

If 3^n is a factor of the determinant [[1,1,1],[n C_(1),(n+3) C_(1) ,(n+6) C_(1) ],[n C_(2) ,(n+3) C_(2) ,(n+6) C_(2)]] then the maximum value of n is

If ,^(n) P_r=^n P_(r+1) and ^n C_r=^n C_(r-1,) then the value of n+r is.

If n is a positive integer satisfying the equation 2+(6*2^(2)-4*2)+(6*3^(2)-4*3)+"......."+(6*n^(2)-4*n)=140 then the value of n is

If ""^(n) P_(4)=20(""^(n)P_(2)) then find the value of n.

If .^(n)P_(3)+.^(n)C_(n-2)=14n , the value of n is

If .^(n)P_(5)=20 .^(n)P_(3) , find the value of n.

If in the expansion of (1+px)^(n),n in N , the coefficial of x and x^(2) are 8 and 24, than the values of n and p are:

HIMALAYA PUBLICATION-PERMUTATION AND COMBINATIONS-Question Bank
  1. The value of sum(r=1)^(n)(nP(r))/(r!)=

    Text Solution

    |

  2. nCr+2. nC(r-1)+nC(r-2)=

    Text Solution

    |

  3. If n+2C(8):n-2P(4)=57:16 then the value of 'n' is

    Text Solution

    |

  4. How many signals can be made by 5 flags from 8 flags of different col...

    Text Solution

    |

  5. How many different words each containing 3 vowels and 5 consonants ca...

    Text Solution

    |

  6. The number of permutations of 'n' different objects taken r at a time...

    Text Solution

    |

  7. The number of different seven digit numbers that can be written usin...

    Text Solution

    |

  8. A polygon has 170 diagnols. How many sides will it have?

    Text Solution

    |

  9. The number of 2 xx 2 matrices having elements 0 and 1 is

    Text Solution

    |

  10. There are 'n' seats round a table numbered 1,2, 3,….,n. The number of...

    Text Solution

    |

  11. All the letters of the word ' EAMCET '' are arranged in all possible w...

    Text Solution

    |

  12. The straight lines , l1,l2 and l3 are parallel and lie in the same pla...

    Text Solution

    |

  13. The sum of the digits in unit place of all the numbers formed with the...

    Text Solution

    |

  14. The number of ways in which 5 boys and 3 girls can he seated in a row ...

    Text Solution

    |

  15. The maximum number of points into which 4 circles and 4 st . Lines int...

    Text Solution

    |

  16. The maximum number of points of intersection of 7 circles is

    Text Solution

    |

  17. The number of four digit even numbers that can be formed using 0,1,2,3...

    Text Solution

    |

  18. How many four digit numbers can be formed using digits 1,2,3,4,5 such ...

    Text Solution

    |

  19. A committee of 6 is chosen from 10 men and 7 women so as to contain at...

    Text Solution

    |

  20. In a class of 10 students there are 3 girls. The number of ways they c...

    Text Solution

    |