Results 1 to 2 of 2

Math Help - Probability Question

  1. #1
    Junior Member asemh's Avatar
    Joined
    Mar 2010
    Posts
    25

    Probability Question

    Hi
    Im having trouble with this question:

    What is the probability of not throwing 7 or doubles for six consecutive throws with a pair of dice.

    I know that for each pair of dice there are 36 possibilities. So the sample space and total number of solutions would be 36^6.
    I understand how to get the denominator but not the numerator.

    I mean isn't their 6 ways of getting a seven with dice and six ways of getting double?
    So i did (12/36)^6 but I end up with 1/729 so since its indirect i do 1 - 1/729. But i still get it wrong.

    The final answer is supposed to be 64/729 btw. So how would I go on about doing this?

    Thanks in advance
    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 asemh View Post
    Hi
    Im having trouble with this question:

    What is the probability of not throwing 7 or doubles for six consecutive throws with a pair of dice.

    I know that for each pair of dice there are 36 possibilities. So the sample space and total number of solutions would be 36^6.
    I understand how to get the denominator but not the numerator.

    I mean isn't their 6 ways of getting a seven with dice and six ways of getting double?
    So i did (12/36)^6 but I end up with 1/729 so since its indirect i do 1 - 1/729. But i still get it wrong.

    The final answer is supposed to be 64/729 btw. So how would I go on about doing this?

    Thanks in advance
    Probability (not throwing 7 or doubles for one dice roll) = 24/36.

    Probability (not throwing 7 or doubles for six dice rolls) = (24/36)^6.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 5
    Last Post: February 10th 2013, 03:11 PM
  2. Probability question
    Posted in the Statistics Forum
    Replies: 2
    Last Post: March 15th 2011, 05:29 PM
  3. Probability question involving (A given B type question )
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: November 9th 2009, 10:08 AM
  4. Probability Question
    Posted in the Statistics Forum
    Replies: 1
    Last Post: September 8th 2008, 11:26 AM
  5. A probability question and an Expectations question
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: January 29th 2006, 07:13 PM

Search Tags


/mathhelpforum @mathhelpforum