Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Probability dice and coin

  1. Mar 24, 2013 #1
    Throw a dice and record the result. After flipping a fair coin. If it comes letters repeat. If it comes up heads stop. (In other words, throw the dice continuously until we crown the currency immediately after throwing the dice.)

    What is the probability that the maximum effect of the dice will be seen exactly 2?


    i think that i must use bernouli type like that : (n c k)p^k(1-p)^n-k but its not correct i hink that i am not use the right way to solve this problem maybe can i have any ideas?
     
  2. jcsd
  3. Mar 24, 2013 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Does that text come from a translation program?
    You throw a die, stop with 50% probability afterwards, and repeat this until you stop, okay.

    What does "maximum effect" mean?
     
  4. Mar 24, 2013 #3
    maximum result of the dice
     
  5. Mar 24, 2013 #4

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    6?

    Can you calculate the probability to get at least one 6? This will help to get the probability of exactly two times 6.
     
  6. Mar 24, 2013 #5
    we want exactly the max result of the dice to be 2.... i dont know how to think to solve this..
     
  7. Mar 24, 2013 #6

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    I posted a hint how you can approach the problem in post 4.
     
  8. Mar 24, 2013 #7
    and how i can calculate at least one 6?
     
  9. Mar 24, 2013 #8

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    What is the probability to get 6 at the first roll?
    If that does not happen (probability?), what is the probability to get it on the second?
    ...
    What is the sum of all of those?
     
  10. Mar 24, 2013 #9
    and how this gonna help me for solve the problem ?
     
  11. Mar 24, 2013 #10

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    That is something you should find out. It is a simple multiplication of values of the intermediate result.

    I will not solve the problem for you, that is not the purpose of this forum.
     
  12. Mar 24, 2013 #11
    when i will find this sum with what i am going to multiply?
     
  13. Mar 24, 2013 #12
    i dont want to solve this for me but i want you to be more specific
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Probability dice and coin
  1. Dice probability (Replies: 2)

  2. Dice Probability (Replies: 3)

  3. Dice probability (Replies: 9)

Loading...