Home
Class 11
MATHS
Three unbiased coins are tossed once. Fi...

Three unbiased coins are tossed once. Find the probability of getting
(i) exactly 2 tails (ii) exactly one tail (iii) at most 2 tails
(iv) at least 2 tails (v) at most 2 tails or at least 2 heads

Text Solution

Verified by Experts

The correct Answer is:
`(i) 3/8 (ii) 3/8 (iii) 7/8 (iv) 1/2 (v) 7/8`
Promotional Banner

Topper's Solved these Questions

  • PROBABILITY

    RS AGGARWAL|Exercise Exercise 31 B|21 Videos

  • PROBABILITY

    RS AGGARWAL|Exercise Examples|32 Videos

  • PRINCIPLE OF MATHEMATICAL INDUCTION

    RS AGGARWAL|Exercise EXERCISE 4|23 Videos

  • Relations

    RS AGGARWAL|Exercise EXERCISE 2E|12 Videos

Similar Questions

Explore conceptually related problems

A coin is tossed once. Find the probability of getting a tail.

An unbaised coin is tossed. Find the probability of getting a tail

Three coins are tossed once. Find the probability of getting at least two tails.

Three unbiased coins are tossed. Find the probability of getting one head and two tails,

A coin is tossed three xx.Find the probability of getting exactly two tails.

Six coins are tossed.What is the probability of getting exactly two tails?

Four coins are tossed once .Find the probability of exactly 2 tail .

Threecoins are tossed once. Find the probability of getting (i) 3 heads (ii) 2 heads (iii) 3 tails.

A coin is tossed once. What is the probaility of getting a tail?

Three unbiased coins are tossed together. Find the probability of getting: (i) all heads. (ii) exactly two heads. (iii) exactly one head. (iv) at least two heads. (v) at least two tails

RS AGGARWAL-PROBABILITY-Exercise 31 A
  1. An urn contains 9 red, 7 white and 4 black balls. A ball is drawn at r...

    Text Solution

    |

  2. In a lottery, there are 10 prizes and 25 blanks. Find the probability ...

    Text Solution

    |

  3. If there are 2 children in a family, find the probability that there i...

    Text Solution

    |

  4. Three unbiased coins are tossed once. Find the probability of getting ...

    Text Solution

    |

  5. In a single throw of two dice, detemine the probability of not getting...

    Text Solution

    |

  6. If a letter is chosen at random from the English alphabet, find the pr...

    Text Solution

    |

  7. A card is drawn at random from a well - shuffled pack of 52 cards. Wha...

    Text Solution

    |

  8. Tickets numbered from 1 to 12 are mixed up together and then a ticket ...

    Text Solution

    |

  9. What is the probability that on ordinary year has 53 Tuesdays ?

    Text Solution

    |

  10. What is the probability that a leap year has 53 Sundays ?

    Text Solution

    |

  11. What is the probability that in a group of two people, both will have ...

    Text Solution

    |

  12. Which of the following cannot be the probability of occurrence of an e...

    Text Solution

    |

  13. If 7/10 is the probability of occurrence of an event, what is the prob...

    Text Solution

    |

  14. The odds in favour of the occurrence of an event are 8 : 13. Find the ...

    Text Solution

    |

  15. If the odds against the occurrence of an event be 4 : 7, find the prob...

    Text Solution

    |

  16. If 5/14 is the probability of occurrence of an event, find (i) the o...

    Text Solution

    |

  17. Two dice are thrown. Find (i) the odds in favour of getting the sum ...

    Text Solution

    |

  18. A combination lock on a suitcase has 3 wheels, each labelled with nine...

    Text Solution

    |

  19. In a lottery, a person choses six different natural numbers at rand...

    Text Solution

    |

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

    Text Solution

    |