Home
Class 12
MATHS
A class consists of 30 boys and 20 girls...

A class consists of 30 boys and 20 girls of which half the boys, and half the girls have blue eyes. Find the probability that a student chosen at random is a boy or has blue eyes.

Text Solution

Verified by Experts

The correct Answer is:
`(4)/(5)`
Promotional Banner

Topper's Solved these Questions

  • PROBABILITY

    CHHAYA PUBLICATION|Exercise LONG ANSWER TYPE QUESTIONS|16 Videos
  • PROBABILITY

    CHHAYA PUBLICATION|Exercise SAMPLE QUESTIONS FOR COMPETITIVE EXAMS|18 Videos
  • PROBABILITY

    CHHAYA PUBLICATION|Exercise VERY SHORT ANSWER TYPE QUESTION|61 Videos
  • PLANE

    CHHAYA PUBLICATION|Exercise Sample Question for Competitive Examination( E Assertion - Reason Type )|2 Videos
  • PRODUCTS OF TWO VECTORS

    CHHAYA PUBLICATION|Exercise Sample Questions for Competitive Examination (Assertion - Reason Type )|2 Videos

Similar Questions

Explore conceptually related problems

Two thirds of eth students in a class are boys and the rest girls. It is known that eh probability of a girl getting a first class is 0.25 and that of a boy getting a first class is 0.28. find the probability that a student chosen at random will get first class marks in the subject.

In a school, there are 1000 students, out of which 430 are girls. It is known that out of 430, 10% of the girls study in class XII. What is the probability that a student chosen randomly studies in class XII, given that the chosen student is a girl ?

4 boys and 2 girls occupy seats in a row at random. Then the probability that the two girls occupy seats side by side is

5 boys and 5 girls are sitting in a row randomly. The probability that boys and girls sit alternately is-

4 boys and 2 girls occupy seats in a row at random. What is the probability that the girls occupy seats side by side?

Five boys and four girls sit in a row randomly. The probability that no two girls sit together

In a class, 5% of the boys and 10% of the girls have an IQ more than 150. In the class 60% of the students are boys and rest girls. If a student is selected at random and found to have an IQ of more than 150, find the probability that the student is a boy.

In a class, 5% of the boys and 10% of the girls have an IQ more than 150. In the class 60% of the students are boys and rest girls. If a student is selected at random and found to have an IQ of more that 150, find the probability that the student is a boy.

It is known that a family has 3 childern and at least 1 of these 3 childern is boy. Find the probability that 2 of the 3 chilidren are boys.

CHHAYA PUBLICATION-PROBABILITY-SHORT ANSWER TYPE QUESTIONS
  1. An executive committee of 6 is formed from 4 ladies and 7 gentlemen. F...

    Text Solution

    |

  2. Four cards are drawn at random from a full packet . Find the probabili...

    Text Solution

    |

  3. A bag contains 10 rupee - coins, 7 fifty-paise coins and 4 twenty finv...

    Text Solution

    |

  4. What is the chance that a leap year selected at random will contain 53...

    Text Solution

    |

  5. Two fair dice are thrown simultaneously. The two scores are then multi...

    Text Solution

    |

  6. Four one-rupee coins and three 50 paise coins are placed at random in ...

    Text Solution

    |

  7. A box contains 40 envelopes of which 25 are ordinary (not meant for ai...

    Text Solution

    |

  8. In a group consisting of 80 men and 30 women, 15 per cent men and 40 p...

    Text Solution

    |

  9. Five Commerce and four Science students are arranged at random in a ro...

    Text Solution

    |

  10. Ten balls are distributed at random among three boxes. What is the pro...

    Text Solution

    |

  11. If the numbers 1,2,3….,n are arranged in a line at random what is the ...

    Text Solution

    |

  12. If P(A) = (1)/(3), P(B) = (1)/(2) , P(Acap B ) = (1)/(4),find the valu...

    Text Solution

    |

  13. Given that P( E) = (1)/(3), P( F) = (1)/(4) and P( E cap F ) = (1)/(6)...

    Text Solution

    |

  14. The probability that a contractor will get a plumbing contract is (2)/...

    Text Solution

    |

  15. A class consists of 30 boys and 20 girls of which half the boys, and h...

    Text Solution

    |

  16. From 200 ticiets marked with the first 200 natural numbers, one is dra...

    Text Solution

    |

  17. There are 52 cards with each of two boys. Each draws a card at random....

    Text Solution

    |

  18. If two numbers are selected at random from the numbers 1,2,3,4 determi...

    Text Solution

    |

  19. A packer of 10 electronic components is known to include 3 defectives....

    Text Solution

    |

  20. A and B are two candidates seeking admission in joint Entrance. The pr...

    Text Solution

    |