Home
Class 11
MATHS
If .^(n-1)P3 :^(n+1)P3 = 5 : 12, find n....

If `.^(n-1)P_3 :^(n+1)P_3 = 5 : 12,` find `n`.

Text Solution

Verified by Experts

The correct Answer is:
15
Promotional Banner

Topper's Solved these Questions

  • PERMUTATION AND COMBINATION

    NAGEEN PRAKASHAN|Exercise Exercise G|34 Videos

  • PERMUTATION AND COMBINATION

    NAGEEN PRAKASHAN|Exercise Exercise H|10 Videos

  • PERMUTATION AND COMBINATION

    NAGEEN PRAKASHAN|Exercise Exercise E|8 Videos

  • MATHEMATICAL REASONING

    NAGEEN PRAKASHAN|Exercise Misellaneous exercise|7 Videos

  • PRINCIPLE OF MATHEMATICAL INDUCTION

    NAGEEN PRAKASHAN|Exercise Exercise 4|29 Videos

Similar Questions

Explore conceptually related problems

Find n if "^nP_3 : ^(n+1)P_3 = 5:12

(i) If "^((n+1))P_(5) : "^(n)P_(6)=2:7 , find n (ii) If "^(n+1)P_5 : "^(n)P_5 = 3:2 ,find n.

2.^(n)P_(3)=^(n+1)P_(3)

If ^(2n+1)P_(n-1):^(2n-1)P_(n)=3:5, find n

If .^nP_4= .^(n+1)P_4=3:4 , find n.

If ""^(2n-1)P_(n): ""^(2n+1)P_(n-1)=22:7 , find n.

(i) If ""^(n)P_(5)=20xx""^(n)P_(3) , find n. (ii) If 16xx""^(n)P_(3)=13xx""^(n+1)P_(3) , find n. (iii) If ""^(2n)P_(3)=100xx""^(n)P_(2) , find n.

Find n if .^(n-)P_(3): .^(n)P_(4) = 1:9 .

If ^(2n+1)P_(n-1):^(2n-1)P_(n)=3:5, then find the value of n.

NAGEEN PRAKASHAN-PERMUTATION AND COMBINATION -Exercise F
  1. If .^(16)C(r) = .^(16)C(r+6), then find .^(5)C(r).

    Text Solution

    |

  2. Determine n if (i) ^2n C2:^n C2=12 :1 (ii) ^2n C3:^n C3=11 :1

    Text Solution

    |

  3. Determine n if (i) ^2n C2:^n C2=12 :1 (ii) ^2n C3:^n C3=11 :1

    Text Solution

    |

  4. Determine n if (i) ^2n C2:^n C2=12 :1 (ii) ^2n C3:^n C3=11 :1

    Text Solution

    |

  5. If .^(15)C(r): .^(15)C(r-1) = 1:5, then find r.

    Text Solution

    |

  6. If .^(n-1)P3 :^(n+1)P3 = 5 : 12, find n.

    Text Solution

    |

  7. If .^(n)P(r) = 720 and .^(n)C(r) = 120, then find r. = (5 xx 4 xx 3...

    Text Solution

    |

  8. If ^(n+1)C(r+1): ^nCr: ^(n-1)C(r-1)=11:6:2 find the values of n and r.

    Text Solution

    |

  9. If .^(n)C(4),.^(n)C(5), .^(n)C(6) are in A.P., then find the value of ...

    Text Solution

    |

  10. If alpha=\ \ ^m C2,\ then find the value of \ ^(alpha)C2dot

    Text Solution

    |

  11. In how many ways can a team of 11 players be selected from 14 players?

    Text Solution

    |

  12. In how many ways 2 persons can be selected from 4 persons?

    Text Solution

    |

  13. In how many ways can a person invites his 2 or more than 2 friends out...

    Text Solution

    |

  14. In how many ways can 11 players be selected from 14 players if (i) a...

    Text Solution

    |

  15. In how many ways can 5 subjects be chosen from 9 subjects if three sub...

    Text Solution

    |

  16. In how many ways can 4 books be chosen from 12 books if (i) there is...

    Text Solution

    |

  17. There are 5 black and 6 red bills in a bag. Find one number of ways in...

    Text Solution

    |

  18. In 25 cricket players, there are 10 batsmen, 9 bowlers, 4 all-rounders...

    Text Solution

    |

  19. There are 8 math's books and 6 science books in a almirah. In how many...

    Text Solution

    |

  20. There are 3 parts A,B and C in a question paper of Math's, which inclu...

    Text Solution

    |