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| Two Dominoes (Posted on 2012-12-04) |
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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)?
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Submitted by Ady TZIDON
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Solution:
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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 |
 | Solution | Jer | 2012-12-04 13:10:45 |
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