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Homework Help: Variable uncertainty

  1. Aug 12, 2011 #1
    1. The problem statement, all variables and given/known data

    Ok, I don't have a problem with the question, but what I believe to be an empty set variable is used which I have not covered in a course before. My problem is that I do not know the relevance of an empty set in part b) of the equation.

    2. Relevant equations

    The equation and original question are attached.

    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Aug 12, 2011 #2
    please ignore this silly question, id delete it but im not sure how
     
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