Home
Class 11
MATHS
If .^(n)P(4): .^(n)P(5) = 1:2, find the ...

If `.^(n)P_(4): .^(n)P_(5) = 1:2`, find the value of n.

Text Solution

Verified by Experts

The correct Answer is:
n=6
Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS AND COMBINATIONS

    CBSE COMPLEMENTARY MATERIAL|Exercise SECTION-A(Fill in the blanks)|6 Videos

  • PERMUTATIONS AND COMBINATIONS

    CBSE COMPLEMENTARY MATERIAL|Exercise SECTION-A(MCQ)|10 Videos

  • MATHEMATICAL REASONING

    CBSE COMPLEMENTARY MATERIAL|Exercise SECTION-B SHORT ANSWER TYPE QUESTIONS|5 Videos

  • PRACTICE PAPER DESIGN - I

    CBSE COMPLEMENTARY MATERIAL|Exercise SECTION -D|6 Videos

Similar Questions

Explore conceptually related problems

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

If ^(n)P_(4)=360, find the value of n

If .^(n)P_(100)=.^(n)P_(99) . Then find the value of n.

If .^(n-1)P_(3):^(n+1)P_(3)=5:12, find n

nP_ (4): ^ (n) P_ (5) = 1: 2 then n =

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

(b) If .^(n)P_(4):^(n+1)P_(4)=5:9 .find n

If .^(m+n)P_(2)=90 and .^(m-n)P_(2)=30 , find the value of m and .

If ^(n+1)P_(5):^(n)P_(6)=2:7 , find n.

If ""^(n)P_(3) = 9240 , then find the value of n.

CBSE COMPLEMENTARY MATERIAL-PERMUTATIONS AND COMBINATIONS -Section - D(Long answer type question)
  1. If .^(n)P(4): .^(n)P(5) = 1:2, find the value of n.

    Text Solution

    |

  2. Using the digits 0, 1, 2, 3, 4, 5, 6 how many 4 digit even numbers can...

    Text Solution

    |

  3. There are 15 points in a plane out of which only 6 are in a straight l...

    Text Solution

    |

  4. If there are 7 boys and 5 girls in a class, then in how many ways they...

    Text Solution

    |

  5. If there are 7 boys and 5 girls in a class, then in how many ways they...

    Text Solution

    |

  6. Using the letters of the word 'EDUCATION' how many words using 6 lette...

    Text Solution

    |

  7. (i)What is the number of ways of choosing 4 cards from a deck of 52 ca...

    Text Solution

    |

  8. What is the number of ways of choosing 4 cards from a deck of 52 cards...

    Text Solution

    |

  9. What is the number of ways of choosing 4 cards from a deck of 52 cards...

    Text Solution

    |

  10. What is the number of ways of choosing 4 cards from a pack of 52 cards...

    Text Solution

    |

  11. How many 3 letter words can be formed using the letters of theword INE...

    Text Solution

    |

  12. How many different four letter words can be formed (with or without me...

    Text Solution

    |

  13. If all letters of word ‘MOTHER’ are written in all possible orders and...

    Text Solution

    |

  14. In how many ways three girls and nine boys can be seated in two vans, ...

    Text Solution

    |

  15. From 6 different novels and 3 different dictionaries, 4 novels and ...

    Text Solution

    |

  16. The set S""=""{1,""2,""3,"" ,""12) is to be partitioned into thr...

    Text Solution

    |

  17. The value of ""^(50)C(4)+sum(r=1)^(6)""^(56-r)C(3), is

    Text Solution

    |

  18. There are two parallel lines L1 and I2 in a plane I1 contains mdiffer...

    Text Solution

    |