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-   -   probability help.. (https://www.askmehelpdesk.com/showthread.php?t=684512)

  • Jul 19, 2012, 12:21 AM
    lionel messi
    probability help..
    A jar contains 5 red and 8 blue marbles. If 3 marbles are selected at random, what is the probability that two are red and one is blue or that one is red and two are blue?
  • Jul 19, 2012, 02:54 AM
    Unknown008
    Post your attempt at the question please.
  • Jul 19, 2012, 08:03 AM
    teacherjenn4
    Tell me what work you have done on this so far.
  • Jul 19, 2012, 10:21 PM
    lionel messi
    P(A)= [(5C2x8C1)+(5C1x8C2)] / 13C3..
  • Jul 20, 2012, 05:31 AM
    Unknown008
    Yup! :)

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