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Two Dominoes (Posted on 2012-12-04) Difficulty: 2 of 5
What is the probability that two dominoes drawn randomly from a standard set of 28 bones will match (i.e. will share the same number of pips, thus allowing concatenation)?

  Submitted by Ady TZIDON    
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Solution: (Hide)
Total probability is (7/28)*(6/27) + (21/28)*(12/27) = 254/756 = 7/18
see JER's explanation

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  Subject Author Date
SolutionSolutionJer2012-12-04 13:10:45
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