Home
Class 12
MATHS
From a class of 12 girls and 15 boys, 12...

From a class of 12 girls and 15 boys, 12 students are to be chosen for a competition including 7 boys and 5 girls. The two girls and 3 boys who won the prizes last year should be included . In how many ways can the selection be made ?

Text Solution

AI Generated Solution

To solve the problem of selecting 12 students from a class of 12 girls and 15 boys, including 7 boys and 5 girls, where 2 girls and 3 boys are already included, we can follow these steps: ### Step 1: Identify the fixed selections We know that 2 girls and 3 boys are already included in the selection. This means we have: - Fixed girls: 2 - Fixed boys: 3 ### Step 2: Determine the remaining selections needed ...
Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS AND COMBINATIONS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment Section A Objective type questions (One option is correct )|51 Videos
  • PERMUTATIONS AND COMBINATIONS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment Section B Objective type questions (One option is correct )|39 Videos
  • PERMUTATIONS AND COMBINATIONS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment Section-J (Aakash Challengers Questions)|7 Videos
  • MATRICES

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section - J) Aakash Challengers Questions|3 Videos
  • PRINCIPLE OF MATHEMATICAL

    AAKASH INSTITUTE ENGLISH|Exercise Section-D:(Assertion-Reason Type Questions)|11 Videos

Similar Questions

Explore conceptually related problems

From a class of 12 boys and 10 girls, 10 students are to be chosen for a competition; at leastincluding 4 boys and 4 girls. The 2 girls who won the prizes last year should be included. In how many ways can the selection be made?

(i) In how many ways a committee of 4 members out of 5 gents and 6 ladies can be formed if there is at least one lady in the committee? (ii) From a class of 12 boys and 8 girls, 10 students are to be chosen for a competition, including at least 4 boys and 4 girls. The two boys who won the prizes last year should be included. In how many was can this selection be made?

Five boys and five girls sit alternately around a round table. In how many ways can this be done?

In a class there are 12 boys and 7 girls. The teacher wants to select either a boy or a girl to represent the class in a competition. In how many ways can the teacher make this selection.

In a class there are 27 boys and 14 girls. The teacher wants to select 1 boy and 1 girl to represent the class in a function. In how many ways can the teacher make this selection?

A class has 20 girls and 16 boys. One student is selected at random. Find the probability that the student is a girl.

There are 12 boys and 8 girls in a class (i) In how many ways can a boy be selected? (ii) In how many ways can one boy and one girl be selected?

There are 25 students in a class in which 15 boys and 10 girls. The class teacher select either a boy or girl for monitor of the class. In how many ways the class teacher can make this selection?

There are 35 students in a class in wjhich there are 22 boys and 13 girls . The class teacher select either a boy or a girl for monitor of the class. In how many ways the class teacher can make this selection ?

A teacher has to select either a boy or a girl from a clas of 12 boys and 15 girls for coordinating a school function. In how many ways can she do it?

AAKASH INSTITUTE ENGLISH-PERMUTATIONS AND COMBINATIONS -Try Yourself
  1. If ""^(n)C(10)=""^(n)C(13) , then find the value of ""^(n)C(2)

    Text Solution

    |

  2. If ""^(15)C(x)=""^(15)C(x+3) , then find the value of X.

    Text Solution

    |

  3. Find ""^(18)C(3)+^(18)C(2)

    Text Solution

    |

  4. Verify that ""^(9)C(5)+""^(9)C(4)=""^(10)C(5)

    Text Solution

    |

  5. If .^(n)C(r-1): .^(n)C(r): .^(n)C(r+1)=3:4:5, find the values of n and...

    Text Solution

    |

  6. Prove that : (""^(n)C(r+1))/(""^(n)C(r))=(n-r)/(r+1)

    Text Solution

    |

  7. In how many ways a committee of 7 members can be selected from 10 memb...

    Text Solution

    |

  8. From a class of 30 student , 3 are to be chosen for a competition . In...

    Text Solution

    |

  9. Find the number of diagonals that can be drawn by joining the angular ...

    Text Solution

    |

  10. Find the number of sides of a polygon having 44 diagonals.

    Text Solution

    |

  11. How many committees of 5 members each can be formed with 8 officials a...

    Text Solution

    |

  12. Out of 7 consonants and 4 vowels, words are to be formed by involving ...

    Text Solution

    |

  13. A box contain 5 different red and 6 different white balls. In how many...

    Text Solution

    |

  14. A commttee of 8 is to be formed from 6 women and 5 men. In how many wa...

    Text Solution

    |

  15. Out of the 12 professors a committee of 5 professors is to be formed ....

    Text Solution

    |

  16. From a class of 12 girls and 15 boys, 12 students are to be chosen for...

    Text Solution

    |

  17. In how many ways can 8 stars(**) signs and 6 triangle (Delta ) signs b...

    Text Solution

    |

  18. In how many ways can 10 identical shirts and 7 identical trousers be p...

    Text Solution

    |

  19. In how many ways 4 different white balls and 6 different black balls b...

    Text Solution

    |

  20. In how many ways can 7 boys and 2 girls be seated in a row so that two...

    Text Solution

    |