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Probability Question

  1. Feb 21, 2008 #1
    1. The problem statement, all variables and given/known data


    then there are 3 numbers linked together for each diagram.

    2. Relevant equations

    3. The attempt at a solution

    could you please point me in the right direction. what shall i look up to answer this question?
  2. jcsd
  3. Feb 21, 2008 #2


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    Linked together how? Do you mean all parts have to work for the system to work, or is it more complicated?
  4. Feb 21, 2008 #3
  5. Feb 21, 2008 #4
    thats all of the question - hope that helps
  6. Feb 21, 2008 #5


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    Well for a, 1, 2, and 3 have to work.
    For b 1 has to work or 2 and 3 have to work.
    For c 1 or 2 have to work and 3 has to work.

    Can you see how to write these statements in the language of probability?
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