Hey there Sign in to join this conversationNew here? Join for free

Series of S2 questions for S2 Exam next week.

Announcements Posted on
Study Help needs new mods! 14-04-2014
Post on TSR and win a prize! Find out more... 10-04-2014
    • 5 followers
    Offline

    ReputationRep:
    (Original post by lack_of_knowledge)
    Argh everything I know is wrong. Isnt the probability of any given dice 1/6. So technically shouldn't the probability of getting a 5 be 2/6 not 2/7 where did you guys get 2/7 from :O
    I dunno why you bumped this thread aha, but the first sentence of that question explains that the die is biased. Thus, the probability isn't 1/6 for every face. Does that answer your question? If the probability of getting a five were 2/6 and the probability of getting all the other faces was 1/6, the total probability would be greater than one. This is a problem. All you need to do is some simple algebra.

    x+x+x+x+2x+x=1
    x=1/7

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?

    this is what you'll be called on TSR

  2. this can't be left blank
    this email is already registered. Forgotten your password?

    never shared and never spammed

  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By completing the slider below you agree to The Student Room's terms & conditions and site rules

  2. Slide the button to the right to create your account

    Slide to join now Processing…

    You don't slide that way? No problem.

Updated: May 21, 2012
Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.