Home
Class 12
MATHS
In a group of boys, two boys are brother...

In a group of boys, two boys are brothers and six more boys are present in the group. In how many ways can they sit if the brothers are not to sit along with each other? a.`2xx6!` b. `^7P_2xx6!` c. `^7C_2xx6!` d. none of these

A

`2xx6!`

B

`7P_(2)xx6!`

C

`7C_(2)xx6!`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
b
Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS & COMBINATIONS

    FIITJEE|Exercise ASSIGNMENT PROBLEMS (OBJECTIVE) LEVEL II|23 Videos
  • PERMUTATIONS & COMBINATIONS

    FIITJEE|Exercise COMPREHENSIONS|9 Videos
  • PERMUTATIONS & COMBINATIONS

    FIITJEE|Exercise ASSIGNMENT PROBLEMS (SUBJECTIVE) LEVEL -II|15 Videos
  • PARABOLA

    FIITJEE|Exercise NUMERICAL BASED|5 Videos
  • PROBABILITY

    FIITJEE|Exercise Exercise 7|2 Videos

Similar Questions

Explore conceptually related problems

In a group of boys,two boys are brothers and six more boys are present in the group.In how many ways can they sit if the brothers are not to sit along with each other? a.2xx6! b.7P_(2)xx6! c.^(7)C_(2)xx6! d.none of these

In a group of boys, two boys are brothers and in this group 6 more boys are there. In how many ways they can sit in a row if the brothers are not to sit side by side? (A) 30240 (B) 1410 (C) 2830 (D) 8420

In how many ways can 7 boys and 2 girls be seated in a row so that two giirls are together ?

There are 6 students A,B,C,D,E,F. In how many ways can they be seated in a line so that C and D do not sit together?

In how many ways 6 boys &6 girls can sit at a round table so that girls& boys sit alternate?

In how many ways can 6boys be seated at a round table so that two particular boys are next to each other is

FIITJEE-PERMUTATIONS & COMBINATIONS-ASSIGNMENT PROBLEMS (OBJECTIVE) LEVEL I
  1. The number of rational numbers lying in the interval (2002,2003) all w...

    Text Solution

    |

  2. The number of sets of three distinct elemetns that can be chosen from ...

    Text Solution

    |

  3. In a group of boys, two boys are brothers and six more boys are pre...

    Text Solution

    |

  4. There are four pairs of shoes of different sizes. Each of the 8 shoes ...

    Text Solution

    |

  5. There are m copies each ofn different books in a university library. T...

    Text Solution

    |

  6. The value of (sum(i=0)^(100).^(k)C(1).^(m-k)C(100-i)((k-i)/(m-100)))/(...

    Text Solution

    |

  7. Number of natural numbers lt2.10^(4), which can be formed with the dig...

    Text Solution

    |

  8. The letters of the word DRAWER are arranged in alphabeticla ordr. The ...

    Text Solution

    |

  9. The number of permuta!ons of the letters of the word HINDUSTAN such th...

    Text Solution

    |

  10. 4 points out of 8 points in a plane are collinear. Number of different...

    Text Solution

    |

  11. Find the three-digit odd numbers that can be formed by using the digit...

    Text Solution

    |

  12. The number of divisors of 3630, which have a remainder of 1 when divid...

    Text Solution

    |

  13. The number of ways in which 15 boys and 2 girls can sit in a row such ...

    Text Solution

    |

  14. The number of rational numbers p/q, where p, q in [1,2,3, 4,5, 6} is

    Text Solution

    |

  15. Let S={1,2,3,....., 100}. The number of non-empty subsets A of S such ...

    Text Solution

    |

  16. On a railway there are 20 stations. The number of different tickets re...

    Text Solution

    |

  17. .^(n)C(r)+2.^(n)C(r-1)+.^(n)C(r-2)=

    Text Solution

    |

  18. How many different nine digit numbers can be formed from the numebr 22...

    Text Solution

    |

  19. A seven-digit number without repetition and divisible by 9 is to be...

    Text Solution

    |

  20. The number of ordered pairs (m,n)(m,n epsilon {1,2,……..20}) such that ...

    Text Solution

    |