MathDB
1997 AJHSME #9 - Probability

Source:

June 30, 2011
probabilityAMC

Problem Statement

Three students, with different names, line up single file. What is the probability that they are in alphabetical order from front-to-back?
<spanclass=′latex−bold′>(A)</span> 112<spanclass=′latex−bold′>(B)</span> 19<spanclass=′latex−bold′>(C)</span> 16<spanclass=′latex−bold′>(D)</span> 13<spanclass=′latex−bold′>(E)</span> 23<span class='latex-bold'>(A)</span>\ \dfrac{1}{12} \qquad <span class='latex-bold'>(B)</span>\ \dfrac{1}{9} \qquad <span class='latex-bold'>(C)</span>\ \dfrac{1}{6} \qquad <span class='latex-bold'>(D)</span>\ \dfrac{1}{3} \qquad <span class='latex-bold'>(E)</span>\ \dfrac{2}{3}
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