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2 coins (Posted on 2016-03-18) Difficulty: 3 of 5
Suppose you have 2 identical-looking coins: one that is fair and one that comes up heads 75% of the time.
You randomly chose one of them, flip it 3 times and it comes up as H-H-T.

What is the chance that the coin you picked is the fair one?

Source: Project Euler

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
SolutionBayesCharlie2016-03-18 11:10:23
SolutionShortcut (spoiler)Steve Herman2016-03-18 11:05:31
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