Ask Me Help Desk

Ask Me Help Desk (https://www.askmehelpdesk.com/forum.php)
-   Math & Sciences (https://www.askmehelpdesk.com/forumdisplay.php?f=402)
-   -   Mathematics probability (https://www.askmehelpdesk.com/showthread.php?t=384278)

  • Aug 6, 2009, 11:12 PM
    himanshu2610
    Mathematics probability
    Q:- Three horses A B and C are in race. A is twice as likely to win as B and B is twice as likely to win as C.what is the probability that B or C wins.
  • Aug 6, 2009, 11:22 PM
    Unknown008

    The total probability is 1.

    So, P(A)+P(B)+P(C)=1
    Since P(A) = 2P(B) and P(B)=2P(C), you can rewrite

    P(A)+P(B)+P(C)=1 as 2P(B)+P(B)+0.5P(B)=1

    Therefore P(B) = 1/(2+1+0.5) = 1/3.5 = 2/7

    For P(C), it'll be 4P(C)+2P(C)+P(C) = 1

    And P(C) = 1/(4+2+1) = 1/7

    P(B or C) = 1/7 + 2/7 = 3/7

    Ok? :)

  • All times are GMT -7. The time now is 12:01 PM.