Home
Class 11
MATHS
If .^(56)P(r+6):^(54)P(r+3)=30800 :1, f...

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

Promotional Banner

Topper's Solved these Questions

  • LOGARITHM

    CENGAGE PUBLICATION|Exercise All Questions|177 Videos

  • PROBABILITY

    CENGAGE PUBLICATION|Exercise All Questions|1 Videos

Similar Questions

Explore conceptually related problems

If .^(n)P_(r)=x.^(n)C_(r) x=

If .^(9)P_(5)+5.^(9)P_(4)=^(10)P_(r) , find r.

If .^(n)P_(r)=504and.^(n)C_(r)=84 find n and r.

Find r if ""^(5)P_(r)=""^(6)P_(r-1)

(n)p_(r)=k^(n)C_(n-r),k=

Find r if ""^(5)P_(r)=2""^(6)P_(r-1)

If .^(n+r)P_(2)=110and .^(n-r)P_(2)=20 , find n and r.

If .^(n)P_(r)=120xx.^(n)C_(n-r) , find the valueof r.

Find r, if 5""^(4)P_(r)=6""^(5)P_(r-1)

If .^(n+r+1)P_(2)=72and.^(n-r)P_(2)=12 then find the values of n and r.

CENGAGE PUBLICATION-PERMUTATIONS AND COMBINATIONS-All Questions
  1. In how many of the permutations of n thing taken r at a time will thre...

    Text Solution

    |

  2. Which term of the GP 3,6,12,24, ... is 3072?

    Text Solution

    |

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

    Text Solution

    |

  4. Five persons entered the lift cabin on the ground floor of an 8-floor ...

    Text Solution

    |

  5. In how many ways first and second rank in mathematics, first and secon...

    Text Solution

    |

  6. Find the number of nonzero determinant of order 2 with elements 0 or 1...

    Text Solution

    |

  7. If p ,q in {1,2,3,4,} , then find the number of equations of form px^2...

    Text Solution

    |

  8. Nishi has 5 coins, each of the different denomination. Find the number...

    Text Solution

    |

  9. Find the number of groups that can be made from 5 different green ball...

    Text Solution

    |

  10. Find the number of natural numbers which are less than 2xx10^8 and whi...

    Text Solution

    |

  11. Find the number of ways in which two small squares can be selected on ...

    Text Solution

    |

  12. Find the number of ways of selection of at least one vowel and one ...

    Text Solution

    |

  13. There are p copies each of n different books. Find the number of ways ...

    Text Solution

    |

  14. A person is permitted to selected at least one and at most n coins fro...

    Text Solution

    |

  15. Let S = {1,2,3,.............. n} and A={(a ,b)"|"1lt=a ,blt=n}=SxxS. ...

    Text Solution

    |

  16. A person invites a group of 10 friends at dinner and sits (i) 5 on a r...

    Text Solution

    |

  17. Find the number of ways in which 10 different diamonds can be arranged...

    Text Solution

    |

  18. Which of the term of the AP 53, 48, 43... is the first negative term?

    Text Solution

    |

  19. Find the number of ways in which six persons can be seated at a round ...

    Text Solution

    |

  20. Determine the A.P whose third term is 16 and 7th exceeds the 5th term ...

    Text Solution

    |