Home
Class 14
MATHS
A box contains 10 black and 10 white ...

A box contains 10 black and 10 white balls. What is the probability of drawing 2 balls of the same colour? `9/(19)` (b) `9/(38)` (c) `(10)/(19)` (d) `5/(19)` (e) None of these

Promotional Banner

Topper's Solved these Questions

  • PIPES AND CISTERNS

    RS AGGARWAL|Exercise All Questions|69 Videos

  • PROBLEMS ON AGES

    RS AGGARWAL|Exercise All Questions|59 Videos

Similar Questions

Explore conceptually related problems

A box contains 4 red,5 green and 6 white balls.A ball is drawn at random from the box. What is the probability that the ball drawn is either red or green? (2)/(5) (b) (3)/(5)( c) (1)/(5) (d) (7)/(15) (e) None of these

A bag contains 13 white and 7 black balls. Two are drawn at random . What is the probability that they are of the same colour ?

A bag contains 5 black and 3 white balls. Two balls are drawn at random. Find the probability of drawing: (i) 2 black balls (ii) 2 white balls.

A box contains 10 balls which are numbered 0 to 9. If one ball is drawn unseen, the probability of drawing a number greater than 6 is

If three balls drawn from a bag contains are 4 red,3 black and 5 white balls.The probability of drawing 2 balls of the same colour and one is of different colour is

A bag contains 30 white and 10 red balls. One ball is drawn at random. What is the probability that the ball drawn is red?

A box contains 20 electric bulbs,out of which 4 are defective.Two balls are chosen at random from this box.The probability that at least one of them is defective,is (4)/(19) (b) (7)/(19) (c) (12)/(19) (d) (21)/(95) (e) None of these

A bag contains 6 white balls & 4 black balls . 2 balls are randomly taken away .Find the probability that they are of the same colour .

RS AGGARWAL-PROBABILITY-All Questions
  1. A basket contains 4 red, 5 blue and 3 green marbles. If three marbl...

    Text Solution

    |

  2. An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles. If 4 m...

    Text Solution

    |

  3. A basket contains 6 blue, 2 red, 4 green and 3 yellow balls. If 5 b...

    Text Solution

    |

  4. An urn contains 2 red, 3 green and 2 blue balls. If 2 balls are dra...

    Text Solution

    |

  5. A box contains 10 black and 10 white balls. What is the probability...

    Text Solution

    |

  6. A box contains 20 electric bulbs, out of which 4 are defective. Two...

    Text Solution

    |

  7. In a class,there are 15 boys and 10 girls.Three students are selected ...

    Text Solution

    |

  8. Four persons are selected at random out of 3 men, 2 women and 4 chi...

    Text Solution

    |

  9. Two dice are tossed. The probability that the total score is a prim...

    Text Solution

    |

  10. In a class, 30% of the students offered English, 20% offered Hindi ...

    Text Solution

    |

  11. A husband and wife appear in an interview for two vacancies in the sam...

    Text Solution

    |

  12. A speaks truth in 75% cases and B in 80% of the cases. In what perc...

    Text Solution

    |

  13. A speaks truth in 60% cases and B speaks truth in 70% cases. The proba...

    Text Solution

    |

  14. A committee of 3 members is to be selected out of 3 men and 2 women...

    Text Solution

    |

  15. A bag contains 3 blue, 2 green and 5 red balls. If four balls are p...

    Text Solution

    |

  16. Dev can hit a target 3 times in 6 shorts Pawan can hit the target 2...

    Text Solution

    |

  17. A bag contains 10 mangoes out of which 4 are rotten. Two mangoes are...

    Text Solution

    |

  18. A bag contains 4 red, 5 yellow and 6 pink balls. Two balls are draw...

    Text Solution

    |

  19. A bag contains 6 red balls 11 yellow balls and 5 pink balls. If two...

    Text Solution

    |

  20. A bag contains 4 red balls, 6 blue balls and 8 pink balls. One ball...

    Text Solution

    |