Home
Class 11
MATHS
In Class XI of a school 40% of the stude...

In Class XI of a school 40% of the students study Mathematics and 30% study Biology. 10% of the class study both Mathematics and Biology. If a student is selected at random from the class, find the probability that he will be studying Mathematics or Biology.

Promotional Banner

Topper's Solved these Questions

  • PRINCIPLE OF MATHEMATICAL INDUCTION

    PSEB|Exercise EXERCISE|23 Videos

  • RELATIONS AND FUNCTIONS

    PSEB|Exercise EXERCISE|54 Videos

Similar Questions

Explore conceptually related problems

A class consists of 10 boys and 8 girls. Three students are selected at random. Find the probability that the selected group has : all Boys.

A class consists of 10 boys and 8 girls. Three students are selected at random. Find the probability that the selected group has : all girls.

Refer the data: Find the probability that a student obtained less than 20% in the mathematics test.

A class consists of 10 boys and 8 girls. Three students are selected at random. Find the probability that the selected group has : 2 boys and 1 girl.

Marks obtained by 2500 students are shown in the following table: A student is selected at random. Find the probability that : he scores more than 80% marks.

Marks obtained by 2500 students are shown in the following table: A student is selected at random. Find the probability that : he scores less than 60% marks.

In a class of 25 students with roll numbers 1 to 25, a student is picked up at random to answer a question. Find the probability that the roll number of the Selected student is either a multiple of 5 or of 7.

In a class having 60% boys, 5% of the boys and 10% of the girls have an I.Q. of more than 150. A student is selected at random and found to have an I.Q. of more than 150. Find the probability that the selected student is a boy.

In a hostel, 60% of the students read Hindi news paper, 40% read English news paper and 20% read both Hindi and English news papers. A student is selected at random. If she reads Hindi news paper, find the probability that she reads English news paper.

PSEB-PROBABILITY-EXERCISE
  1. Events E and F are such that P(not E or not F) = 0.25, State whether E...

    Text Solution

    |

  2. A and B are events such that P(A) = 0.42, P(B) = 0.48 and P(A and B) =...

    Text Solution

    |

  3. In Class XI of a school 40% of the students study Mathematics and 30% ...

    Text Solution

    |

  4. In an entrance test that is graded on the basis oftwo examinations, th...

    Text Solution

    |

  5. The probability that a student will pass the final examination in both...

    Text Solution

    |

  6. In a class of 60 students, 30 opted for NCC, 32 opted for NSS and 24 o...

    Text Solution

    |

  7. In a class of 60 students, 30 opted for NCC, 32 opted for NSS and 24 o...

    Text Solution

    |

  8. A box contains 10 red marbles, 20 blue marbles and 30 green marbles. 5...

    Text Solution

    |

  9. 4 cards are drawn from a well -shuffled deck of 52 cards. What is the ...

    Text Solution

    |

  10. A die has two faces each with number ‘1’, three faces each with number...

    Text Solution

    |

  11. A die has two faces each with number ‘1’, three faces each with number...

    Text Solution

    |

  12. A die has two faces each with number ‘1’, three faces each with number...

    Text Solution

    |

  13. In a certain lottery 10,000 tickets are sold and ten equal prizes are ...

    Text Solution

    |

  14. Out of 100 students, two sections of 40 and 60 are formed. If you and ...

    Text Solution

    |

  15. Out of 100 students, two sections of 40 and 60 are formed. If you and ...

    Text Solution

    |

  16. A and B are two events such that P(A) = 0.54, P(B) = 0.69 and P(A nn B...

    Text Solution

    |

  17. A and B are two events such that P(A) = 0.54, P(B) = 0.69 and P(A nn B...

    Text Solution

    |

  18. A and B are two events such that P(A) = 0.54, P(B) = 0.69 and P(A nn B...

    Text Solution

    |

  19. A and B are two events such that P(A) = 0.54, P(B) = 0.69 and P(A nn B...

    Text Solution

    |

  20. If 4-digit numbers greater than 5,000 are randomly formed from the dig...

    Text Solution

    |