Home
Class 11
MATHS
What is the probability that a number se...

What is the probability that a number selected from the number 1,2,3…..25, is prime number, when each of the given numbers is equally likely to be selected?

Text Solution

Verified by Experts

Total set ={1,2,3,4,...,25}=25 This determines size of set
Prime numbers is it ={2,3,5,7,11,13,17,19,23}
size =9
Probability =9/25
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

What is the probability that a number selected from the number 1,2,3....,25 is a prime number,when each of the given numbers is equally likely to be selected?

what is the probability that a number selected from the numbers 1,2,3,….,20 , is a prime number when each of the given numbers is equally likely to be selected ?

Find the probability that a number selected from the number 1to 25 is not a prime number when each of the given numbers is equally likely to be selected.

(i) What is the probability that the numbers selected from the numbers 1,2,3,…….,30 is a prime number? You may assume that each of the 30 numbers is equally likely to be selected. (ii) What is the probability that a number selected from 1,2,3,...........,25 is a prime number if each of the 25 numbers is equally likely to be selected?

What is the probability that a number selected from the numbers 1,2,3, ; 15 is a multiple of 4?

What is the probability that a number selected at random from the numbers 3,4,5,......,9 is a multiple of 4?

The probability that number selected at random from the numbers 1,2,3,…,15 is a multiple of 4, is

RD SHARMA-PROBABILITY-Solved Examples And Exercises
  1. Tickets numbered from 1 to 20 are mixed up together and then a tick...

    Text Solution

    |

  2. Find the probability that a leap year, selected at random, will con...

    Text Solution

    |

  3. What is the probability that a number selected from the number 1,2,...

    Text Solution

    |

  4. A fair coin with 1 marked on one face and 6 coin the other and a fa...

    Text Solution

    |

  5. A die has two faces each with number 1, three faces each with numbe...

    Text Solution

    |

  6. What is the probability tht a randomly chosen two digit integer is ...

    Text Solution

    |

  7. A box contains 10 rd marbles, 20 blue marbles and 30 green marbles....

    Text Solution

    |

  8. In a lottery 10,000 tickets are sold and ten equal prizes are award...

    Text Solution

    |

  9. The number lock of  a suitcase has 4 wheels, each labelled with ten...

    Text Solution

    |

  10. Out of 100 students two sections of 40 and 60 students are formed. ...

    Text Solution

    |

  11. In a single throw of three dice, determine the probability of getti...

    Text Solution

    |

  12. If the letters of the word ATTRACTION are written down at random, fi...

    Text Solution

    |

  13. Out of 9 outstanding students in a college, there are 4 boys and 5 ...

    Text Solution

    |

  14. In a lot of 12 Microwave ovens, there are 3 defective units. A perso...

    Text Solution

    |

  15. In a really race there are give teams, A, B, C, D and E i.          ...

    Text Solution

    |

  16. The odds in favours of an event are 3:5. Find the probability of oc...

    Text Solution

    |

  17. A letter is chosen at random from the word ASSASSINATION. Find the ...

    Text Solution

    |

  18. If 4-digits numbers greater than or equal to 5000 are randomly forme...

    Text Solution

    |

  19. Three letters are dictated to three person and an envelope is addre...

    Text Solution

    |

  20. In how many ways, can three girls can three girls and nine boys be ...

    Text Solution

    |