Chapter 3. Probability: Randomness
              Sets, Subsets and Elements
  Sets, Subsets and Elements 
                    
    Consider the following two sets #A# and #B#:
\[\begin{array}{rcl}
A &=& \{12,\,1,\,5,\,11,\,2,\,9,\,14,\,13,\,7\}\\\\
B &=&\{5,\,9,\,2\}
\end{array}\]
Which of the following statements is true?
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