Home
Class 12
MATHS
n different letters are put at random in...

n different letters are put at random in n addressed envelopes. What is the probability that no letter is placed in the correct envelope?

Promotional Banner

Topper's Solved these Questions

  • Elementary Probability

    A DAS GUPTA|Exercise Exercise|137 Videos
  • Differentiation

    A DAS GUPTA|Exercise Exercise|98 Videos
  • Ellipse and Hyberbola

    A DAS GUPTA|Exercise EXERCISE|65 Videos
A DAS GUPTA-Elementary Probability-Exercise
  1. Cards are drawn one at random from a well shuffled full pack of 52 ...

    Text Solution

    |

  2. A square is inscribed in a circle with radius 7sqrt(2) units. Find the...

    Text Solution

    |

  3. n different letters are put at random in n addressed envelopes. What ...

    Text Solution

    |

  4. A die is tossed and when 6 appears then a coin is tossed two times. Wh...

    Text Solution

    |

  5. A private tutor admits 10 students, boys or girls, in a batch. The pr...

    Text Solution

    |

  6. If in 6 trials of an experiment the probability of a successes is 5 ti...

    Text Solution

    |

  7. Suppose the probability for A to win a game against B is 0.4. If A has...

    Text Solution

    |

  8. A hotel has 5 rooms for rental and they are always occupied. The owner...

    Text Solution

    |

  9. Numberse are selected at random, one at a time, from the two-digit num...

    Text Solution

    |

  10. The minimum number of tosses of a pair of dice so that the probability...

    Text Solution

    |

  11. There is a circle in the x-y plane whose equation is x^2+ y^2 = 49 a...

    Text Solution

    |

  12. There are two circles in the x-y plane whose equations are x^2+ y^2 - ...

    Text Solution

    |

  13. If there are 50 students in a class out of which 35 are boys.if only 6...

    Text Solution

    |

  14. A real number x is selected at random from the solution set of inequ...

    Text Solution

    |

  15. Three tangents are drawn at random to a given circle. Show that the od...

    Text Solution

    |

  16. A floor is paved with rectangular marble blocks, each of length a and ...

    Text Solution

    |

  17. A letter is taken out at random from 'ASSIGNMENT' and another from 'A...

    Text Solution

    |

  18. A fair dice is rolled once. The probability that an odd number less t...

    Text Solution

    |

  19. The probabilities of two independent events A and B are respectively ...

    Text Solution

    |

  20. Two students A and B solve a problem. Their respective probabilities ...

    Text Solution

    |