Home
Class 12
MATHS
A real estate man has eight master keys ...

A real estate man has eight master keys to open several new homes. Only one master key will open any given house. If 40% of these homes are usually left unlocked, what is the probability that the real estate man can get into a specific home if he selects three master keys at random before leaving the office?

Promotional Banner

Topper's Solved these Questions

  • PRINCIPLE OF MATHEMATICAL INDUCTION

    CENGAGE PUBLICATION|Exercise Sovled Examples|22 Videos
  • PROBABILITY I

    CENGAGE PUBLICATION|Exercise JEE Advanced|7 Videos
CENGAGE PUBLICATION-PROBABILITY-All Questions
  1. Consider a sample space "S" representing the adults in a small town wh...

    Text Solution

    |

  2. There are three coins, One is two headed coin, another is a biased coi...

    Text Solution

    |

  3. A real estate man has eight master keys to open several new homes. O...

    Text Solution

    |

  4. A card from a pack of 52 cards is lost. From the remaining cards of ...

    Text Solution

    |

  5. An unbiased coin is tossed. If the result is a head, a pair of unbi...

    Text Solution

    |

  6. A number is selected at random from the first 25 natural numbers. I...

    Text Solution

    |

  7. The probability that a student is not a swimmer is 1/5 . Then the prob...

    Text Solution

    |

  8. Aa n dB are two candidates seeking admission in IIT. The probability...

    Text Solution

    |

  9. Probability that A speaks truth is 4/5 . A coin is tossed. A reports...

    Text Solution

    |

  10. An urn contains 4 balls. Two balls are drawn at random from the urn...

    Text Solution

    |

  11. If two events Aa n dB are such that P(A)=0. 3 ; P(B)=0. 4 ; P( ba...

    Text Solution

    |

  12. Determine P" "(E|F) in : A coin is tossed three times, where (i) E...

    Text Solution

    |

  13. Aa n dB play a series of games which cannot be drawn and p , q are ...

    Text Solution

    |

  14. How many times must a man toss a fair coin so that the probability of ...

    Text Solution

    |

  15. Suppose that 90% of people are right-handed. What is the probability t...

    Text Solution

    |

  16. A die is thrown 7 times. What is the chance that an odd number turns...

    Text Solution

    |

  17. If P(A)=0. 8 ,P(B)=0. 5 ,a n dP(B//A)=0. 4 , find (i) P(AnnB) (ii)P(A/...

    Text Solution

    |

  18. Two dice are thrown. What is the probability that the sum of the nu...

    Text Solution

    |

  19. What is the probability of guessing correctly at least 8 out of 10 ...

    Text Solution

    |

  20. An experiment succeeds twice as often as it fails. Find the probabilit...

    Text Solution

    |