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Problem of the Day #7: Probability that spider is above Seungln March 26, 2011

Posted by Sreenath in : potd , trackback

Albert, Billy, Mitchell, Seungln, and Saketh are standing in a line. They rearrange themselves randomly such that Seungln is not next to Albert or Saketh. There is a spider on the ceiling above the first spot in the line. What is the probability that the spider is directly above Seungln?

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