Home
Class 12
MATHS
How many times must a man toss a fair co...

How many times must a man toss a fair coin so that the probability of having at least one head is more than 90%?

Text Solution

Verified by Experts

The correct Answer is:
`n ge 4`
Promotional Banner

Topper's Solved these Questions

  • PROBABILITY

    NCERT BANGLISH|Exercise EXERCISE 3.5|15 Videos

  • MATRICES

    NCERT BANGLISH|Exercise Miscellaneous Exercise on Chapter 3|15 Videos

  • RELATIONS AND FUNCTIONS

    NCERT BANGLISH|Exercise MISCLELLANEOUS EXERCISE ON CHAPTER 1|19 Videos

Similar Questions

Explore conceptually related problems

The probability of a man hitting a target is (1)/(4) . How many times must he fire so that the probability of his hitting the target at least once is greater than (2)/(3) ?

Two imbaised coins are tossed at a time. What is the probability of getting at least one tail?

If a fair coin is tossed thrice find the probability that there are at least one head

If a fair is tossed 10 times, find the probability of at least six heads.

Find the probability of getting at least one tail in 4 tosses of a coin.

Three Coins are tossed: What is the probability of getting at least one tail?

The minimum number of times a fair coin needs to be tossed, so that the probability of getting at least two heads is at least 0.96 is :

The minimum number of times a fair coin needs to be tossed, so that the probability of getting at least two head is at least 0.96, is-

A fair coin is tossed 10 times. The probability of getting exactly 6 heads is -

NCERT BANGLISH-PROBABILITY-MISCELLANEOUS EXERCISE ON CHAPTER 13
  1. A and B are two events such that P (A) != 0. Find P(B|A), if (i) A ...

    Text Solution

    |

  2. A couple has two children, (i) Find the probability that both child...

    Text Solution

    |

  3. Suppose that 5% of men and 0.25% of women have grey hair. A grey haire...

    Text Solution

    |

  4. Suppose that 90% of people are right-handed. What is the probability t...

    Text Solution

    |

  5. An urn contains 25 balls of which 10 balls bear a mark 'X' and the rem...

    Text Solution

    |

  6. In a hurdle race, a player has to cross 10 hurdles. The probability th...

    Text Solution

    |

  7. A die is thrown again and again until three sixes are obtained. Find t...

    Text Solution

    |

  8. If a leap year is selected at random, what is the chance that it will ...

    Text Solution

    |

  9. An experiment succeeds twice as often as it fails. Find the probabilit...

    Text Solution

    |

  10. How many times must a man toss a fair coin so that the probability of ...

    Text Solution

    |

  11. In a game, a man wins a rupee for a six and loses a rupee for any othe...

    Text Solution

    |

  12. Suppose we have four boxes A,B,C and D containing coloured marbles as ...

    Text Solution

    |

  13. Assume that the chances of a patient having a heart attack is 40%. It ...

    Text Solution

    |

  14. If each element of a second order determinant is either zero or one, w...

    Text Solution

    |

  15. An electronic assembly consists of two subsystems, say, A and B. From ...

    Text Solution

    |

  16. Bag I contains 3 red and 4 black balls and Bag II contains 4 red and 5...

    Text Solution

    |

  17. Choose the correct answer: If A and B are two events such that P(A) ...

    Text Solution

    |

  18. Choose the correct answer: If P(A|B) gt P(A), then which of the foll...

    Text Solution

    |

  19. Choose the correct answer: If A and B are any two events such that P...

    Text Solution

    |