Home
Class 12
MATHS
If ""^(n)C(21)=""^(n)C(28), then find ""...

If `""^(n)C_(21)=""^(n)C_(28)`, then find `""^(50)C_(n)`

Text Solution

Verified by Experts

The correct Answer is:
50
Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS & COMBINATIONS

    AAKASH SERIES|Exercise EXERCISE -1.5 SHORT ANSWER QUESTIONS|15 Videos

  • PERMUTATIONS & COMBINATIONS

    AAKASH SERIES|Exercise ADDITIONAL EXERCISE|50 Videos

  • PERMUTATIONS & COMBINATIONS

    AAKASH SERIES|Exercise EXERCISE -1.4 SHORT ANSWER QUESTIONS|13 Videos

  • PARTIAL FRACTIONS

    AAKASH SERIES|Exercise PRACTICE EXERCISE|31 Videos

  • PROBABILITY

    AAKASH SERIES|Exercise Practise Exercise|165 Videos

Similar Questions

Explore conceptually related problems

""^(2n)C_(2)-2""^(n)C_(2)=

If ""^(n) C_(12) = ""^(n)C_(8) then n=

If ""^(n+1)C_(3)=4""^(n)C_(2) then n=

If ""^(n)C_(21)=""^(n)C_(27)" find " ""^(49)C_(n)

If ""^(n)C_(8)=""^(n)C_(2) , find ""^(n)C_(2) .

If ""^(n)C_(5)=""(n)C_(6) , then find 13_(Cn) .

If ""^(n)C_(9)=""^(n)C_(8) , find ""^(n)C_(17) .

If ""^(n)C_(4)=""^(n)C_(6) , find n.

AAKASH SERIES-PERMUTATIONS & COMBINATIONS-EXERCISE -1.5 VERY SHORT ANSWER QUESTIONS
  1. If ""^(n)C(4)=""^(n)C(6), find n.

    Text Solution

    |

  2. If ""^(12)C(r+1)=""^(12)C(3r-5), find r.

    Text Solution

    |

  3. If ""^(n)C(21)=""^(n)C(28), then find ""^(50)C(n)

    Text Solution

    |

  4. If ""^(9)C(3)+""^(9)C(5)=""^(10)C(r) then find r.

    Text Solution

    |

  5. Find the value of ""^(10)C(5)+2. ""^(10)C(4)+""^(10)C(3).

    Text Solution

    |

  6. Simplify ""^(34)C(5)+ overset(4) underset(r=0)Sigma ""^((38-r))C(4).

    Text Solution

    |

  7. If ""^(n)P(r)=5040 and ""^(n)C(r)=210, find n and r.

    Text Solution

    |

  8. Find the number of ways of selecting 7 members from a contingent of 10...

    Text Solution

    |

  9. Find the number of ways of selecting 3 girls and 3 boys out of 7 girls...

    Text Solution

    |

  10. Find the number of ways of selecting 3 vowels and 2 consonants from th...

    Text Solution

    |

  11. Find the number of ways of selecting 4 English, 3 Telugu and 2 Hindi b...

    Text Solution

    |

  12. Find the number of ways of selecting a committee of 6 members out of 1...

    Text Solution

    |

  13. Find the number of ways of selecting 5 books from 9 different mathemat...

    Text Solution

    |

  14. The number of five letter words can be formed using 3 consonent...

    Text Solution

    |

  15. 10 persons are sitting in a row. Find the number of ways of selecting ...

    Text Solution

    |

  16. 10 persons are sitting around a circle. In how many ways can 2 persons...

    Text Solution

    |

  17. If a set of 'm' parallel lines intersect another set of 'n' parallel l...

    Text Solution

    |

  18. Find the number of diagonals of a polygon with 12 sides.

    Text Solution

    |

  19. If there are 5 alike pens, 6 alike pencils and 7 alike erasers, find t...

    Text Solution

    |

  20. Find the number of positive divisors of 1080

    Text Solution

    |