Home
Class 12
MATHS
There are 25 girls and 15 boys in class ...

There are 25 girls and 15 boys in class XI and 30 boys and 20 girls in class XII. If a student chosen from a class, selected at random, happens to be a boy, find the probability that he has been chosen from class XII.

Text Solution

Verified by Experts

The correct Answer is:
`(8)/(13)`
Promotional Banner

Topper's Solved these Questions

  • CHSE ODISHA EXAMINATION PAPER 2020

    ARIHANT PUBLICATION|Exercise GROUP C (ANSWER ANY ONE QUESTIONS)|11 Videos

  • CHSE ODISHA EXAMINATION PAPER 2020

    ARIHANT PUBLICATION|Exercise GROUP C (ANSWER ANY ONE QUESTIONS)|11 Videos

  • CHSE ODISHA EXAMINATION PAPER 2019

    ARIHANT PUBLICATION|Exercise Group C (30 Marks) |13 Videos

  • CONTINUITY AND DIFFERENTIABILITY

    ARIHANT PUBLICATION|Exercise CHAPTER PRACTICE (4 MARK)|47 Videos

Similar Questions

Explore conceptually related problems

There are 20 boys and 10 girls in a class. If a committee of 6 is to be chosen at random having at least 2 boys and 2 girls, find the probability that there are 3 boys in the committee

There are 20 boys and 10 girls in a class. If a committee of 6 is to be chosen at random having at least 2 boys and 2 girls, find the probability that there are 4 boys in the committee

A man has three children out of them atleast one is boy, then find the probability that he has two boys and one girl.

From the set of all families having three children, a family is picked at random If the eldest child happens to be a girl, find the probability that she has two brothers.

In a group of students, there are 3 boys and 3 girls, 4 students are to be selected at random from the group. Find the probability that either 3 boys and I girl or 3 girls and 1 boy are selected.

A class consists of 25 boys and 15 girls. If a committee of 6 is to be chosen at random, find the probability that are exactly 3 boys in the committee

ARIHANT PUBLICATION-CHSE ODISHA EXAMINATION PAPER 2020 -GROUP B (ANSWER ANY THREE QUESTIONS)
  1. Four cards are drawn successively with replacement from a well shuffle...

    Text Solution

    |

  2. Find the inverse of the matrix [{:(4,-2),(3,1):}]

    Text Solution

    |

  3. There are two families A and B. There are 4 men, 6 women and 2 childre...

    Text Solution

    |

  4. Eliminate x,y,z from a=x/y-z, b=y/z-x, c=z/x-y

    Text Solution

    |

  5. There are 25 girls and 15 boys in class XI and 30 boys and 20 girls in...

    Text Solution

    |

  6. Show that the tangent to the curve x = a (t - sin t), y = at (1 + cos ...

    Text Solution

    |

  7. Examine the continuity of the following function at x = 0 :f(x)={(2x+1...

    Text Solution

    |

  8. If sin (x + y) = y cos (x + y) then prove that dy/dx =-(1 + y^2)/y^2

    Text Solution

    |

  9. What is the derivative of sec^(-1)(1/(2x^2-1)),with respect to(sqrt(1...

    Text Solution

    |

  10. Find the approximate value of sqrt(48.96)

    Text Solution

    |

  11. Solve : In((dy)/(dx)) = 3x+4y given that y=0, when x=0.

    Text Solution

    |

  12. Evaluate the following integrals int(3sinx+28cosx)/(5sinx+6cosx)dx

    Text Solution

    |

  13. Evaluate the following integrals : int(0)^(pi//2)log|(4+3sinx)/(4+3c...

    Text Solution

    |

  14. The area between x=y^(2) and x=4 is divided into two equal parts by th...

    Text Solution

    |

  15. Solve: xdy/dx+y=y^2ln x

    Text Solution

    |

  16. Prove that the measure of the angle between two main diagonals of a cu...

    Text Solution

    |

  17. Prove that the four points with position vectors 2veca+3vecb-vecc, vec...

    Text Solution

    |

  18. If veca = 3hati+hatj-2hatk, vecb = 2hati-3hatj+4hatk then verify that ...

    Text Solution

    |

  19. Passing throughthe point (2,-3,1) and (-1,1-7) and perpendicular to th...

    Text Solution

    |

  20. Find the perpendicular distance of the point (-1,3,9) from the line (x...

    Text Solution

    |