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What is the best question? (Posted on 2018-05-02) |
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Anthony and Barbara play the following game. First,
Barbara selects a card from an ordinary set of 52 playing
cards. Then, Anthony guesses which card Barbara
selected. If he guesses correctly, Barbara pays him 100
euros. If he guesses incorrectly, Anthony pays Barbara 4
euros. To make the game a bit more interesting, Anthony
is allowed to ask a yes/no question before he guesses,
and Barbara has to answer his question truthfully. Which
question is better: “Do you have a red card?” or “Do
you have the Queen of hearts?”?
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