Results 1 to 3 of 3

Math Help - [SOLVED] probablilty of three dices

  1. #1
    Member helloying's Avatar
    Joined
    Jul 2008
    Posts
    177

    [SOLVED] probablilty of three dices

    if three unbias dices are thrown, what is probabilty that all three dices give the same no. i would attempt by 1/6 x 1/6 x 1/6 x 6 is it correct?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by helloying View Post
    if three unbias dices are thrown, what is probabilty that all three dices give the same no. i would attempt by 1/6 x 1/6 x 1/6 x 6 is it correct?
    There are 6 favourable outcomes (list them) and 6^3 possible outcomes. Therefore .... (so yes, you are correct).

    By the way, the singular is die, the plural is dice (mouse is the singular, mice not mices is the plural).
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member

    Joined
    May 2006
    From
    Lexington, MA (USA)
    Posts
    11,814
    Thanks
    703
    Hello, helloying!

    Another approach . . .


    If three unbiased dice are thrown,
    what is probabilty that all three dice give the same number?

    The first die can be any number (it doesn't matter).

    The probability that the second die matches the first is: . \tfrac{1}{6}

    The probability that the third die matches the first two is: . \tfrac{1}{6}

    Therefore: . P(\text{same number}) \;=\;\frac{1}{6} \times \frac{1}{6} \;=\;\frac{1}{36}

    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: January 31st 2011, 11:25 AM
  2. Probablilty-with marbles!
    Posted in the Statistics Forum
    Replies: 3
    Last Post: March 23rd 2010, 07:41 PM
  3. Help needed for a probablilty question
    Posted in the Statistics Forum
    Replies: 3
    Last Post: February 19th 2010, 10:56 AM
  4. Replies: 3
    Last Post: February 19th 2009, 02:20 AM
  5. [SOLVED] Checking an answer about dices :D
    Posted in the Advanced Statistics Forum
    Replies: 9
    Last Post: June 7th 2008, 06:16 AM

Search Tags


/mathhelpforum @mathhelpforum