Home
Class 11
MATHS
Find r if "^5Pr =2 "^6P(r-1)....

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

Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS AND COMBINATIONS

    JBD PUBLICATION|Exercise EXAMPLE|59 Videos

  • MODEL PAPER (8)

    JBD PUBLICATION|Exercise EXERICSE|41 Videos

  • PRINCIPLE OF MATHEMATICAL INDUCTION

    JBD PUBLICATION|Exercise EXAMPLE|11 Videos

Similar Questions

Explore conceptually related problems

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

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

Find r if : "^10P_r= 2^9P_r .

Find the value of r if 5. ^4P_r= 6. "^5P_(r-1) .

Find r if : ^10P_(r+1): "^11 P_(r)= 30:11 .

Find r if : P(11,r) = P(12,r-1)

Prove that : ^nP_r= "^(n-1)P_r+r ^(n-1)P_(r-1) , for all natural numbers n and r for which the symbols are defined.

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

Find the value of r, if (i) .^(11)P_(r)=990 (ii) .^(8)P_(5)+5*^(8)P_(4)=^(9)P_(r)

JBD PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXAMPLE
  1. Find the value of n such that ""^nP5 = 42 ""^nP3,,n gt 4.

    Text Solution

    |

  2. Find n if "^(n-1)P3 : "^nP4 =1:9.

    Text Solution

    |

  3. Find r if "^5Pr =2 "^6P(r-1).

    Text Solution

    |

  4. How many words, with or without meaning can be made from the letters o...

    Text Solution

    |

  5. How many words, with or without meaning can be made from the letters o...

    Text Solution

    |

  6. How many words, with or without meaning can be made from the letters o...

    Text Solution

    |

  7. How many words, with or without meaning can be made from the letters o...

    Text Solution

    |

  8. How many words can be formed by using the letters of the word 'ORIENTA...

    Text Solution

    |

  9. There are three prizes to be distributed among 6 students. In how many...

    Text Solution

    |

  10. There are three prizes to be distributed among 6 students. In how many...

    Text Solution

    |

  11. There are three prizes to be distributed among 6 students. In how many...

    Text Solution

    |

  12. In how many ways can the letters of the word ASSASSINATION be arranged...

    Text Solution

    |

  13. In how many ways can be letters of word 'ASSASSINATION' be arranged so...

    Text Solution

    |

  14. How many different words, with or without meaning can be formed by usi...

    Text Solution

    |

  15. How many different words, with or without meaning can be formed by usi...

    Text Solution

    |

  16. How many different words can be formed by using the letters of the wor...

    Text Solution

    |

  17. How many different words can be formed by using the letters of the wor...

    Text Solution

    |

  18. A committee of 7 has to be formed from 9 boys and 4 girls. In how many...

    Text Solution

    |

  19. A committee of 7 has to be formed from 9 boys and 4 girls. In how many...

    Text Solution

    |

  20. A committee of 7 has to be formed from 9 boys and 4 girls. In how many...

    Text Solution

    |