Home
Class 11
MATHS
Tickets numbered from 1 to 20 re mixed u...

Tickets numbered from 1 to 20 re mixed up together and then a ticket is drawn at random. What is the probability that the ticket has a number which is a multiple of 3 or 7?

Text Solution

Verified by Experts

Since, total tickets `= 20`
Multiples of 3 or 7 from `1` to `20` are:
`3,6,7,9,12,14,15,18`
∴ favorable outcomes=8
∴ required probability `= 8/(20)​=2/5​`
Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS

    RD SHARMA|Exercise Solved Examples And Exercises|287 Videos

  • QUADRATIC EQUATIONS

    RD SHARMA|Exercise Solved Examples And Exercises|85 Videos

Similar Questions

Explore conceptually related problems

Tickets numbered from 1 to 20 are mixed up together and then a ticket is drawn at random. What is the probability that the ticket has a number which is a multiple of 3 or 7?

Tickets numbered from 1 to 20 are mixed up together and then a ticket is drawn at random. What is the probability that the ticket has a number which is a multiple of 3 or 7?

Tickets numbered from 1 to 12 are mixed up together and then a ticket is withdrawn at random. Find the probability that the ticket has a number which is a multiple of 2 or 3.

Tickets are numbered from 1 to 18 are mixed up together and then 9 ticket is drawn at random . Find the probability that the ticket has a number , which is a multiple of 2 or 3 .

Tickets numbered from 1 to 20 are mixed up and a ticket is drawn at random.What is the probability that the ticket drawn has a number which is a multiple of 3 and 7?

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random.What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?(1)/(2) (b) (2)/(5) (c) (8)/(15) (d) (9)/(20)

RD SHARMA-PROBABILITY-Solved Examples And Exercises
  1. In shuffling a pack of 52 playing cards, four are accidently droppe...

    Text Solution

    |

  2. From a deck of 52 cards, four cards are drawn simultaneously find t...

    Text Solution

    |

  3. Tickets numbered from 1 to 20 re mixed up together and then a ticke...

    Text Solution

    |

  4. A bag contains 6 red, 4 white and 8 blue balls. If three balls are ...

    Text Solution

    |

  5. A bag contains 6 red, 4 white and 8 blue balls. If three balls are d...

    Text Solution

    |

  6. A bag contains 6 red, 4 white and 8 blue balls. If three balls are ...

    Text Solution

    |

  7. There are four men and six women on the city councils. If one counc...

    Text Solution

    |

  8. A box contains 100 bulbs 20 of which are defective. 10 bulbs are se...

    Text Solution

    |

  9. Find the probability that in a random arrangement of the letters of...

    Text Solution

    |

  10. The letters of the word FORTUNATES are arranged at random in a row....

    Text Solution

    |

  11. A committee of two persons is selected from two men and two women. W...

    Text Solution

    |

  12. If odds in favour of an event be 2:3 find the probability of occurr...

    Text Solution

    |

  13. Two balls are drawn at random from a bag containing 2 white, 3 red,...

    Text Solution

    |

  14. Two unbiased dice were thrown. Find the probability that neither a dou...

    Text Solution

    |

  15. A bag contains 5 red, 6 where and 7 black balls. Two balls are draw...

    Text Solution

    |

  16. If a letter is chosen at random from the English alphabet, find the pr...

    Text Solution

    |

  17. In  a lottery, a person chooses six different numbers at random fro...

    Text Solution

    |

  18. Two dice are thrown. Find the odds in favour of getting the sum i. ...

    Text Solution

    |

  19. A box contains 10red marbles, 20 blue marbles and 30 green marbles....

    Text Solution

    |

  20. What are the odds is favour of getting a spade if a card is drAwn f...

    Text Solution

    |