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One up (Posted on 2014-08-22) Difficulty: 2 of 5
Start with a unit square (n=1). At each step, randomly increase either the Length or Width (with equal chance) by 1 unit, for example, by the time n=3 there is either a 1x3 or a 2x2 rectangle. What is the expected value of the area at step n?

See The Solution Submitted by Larry    
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  Subject Author Date
SolutionWith computer assistanceCharlie2014-08-22 12:33:30
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