这是vladimir arnold出的题目,见http://spaces.ac.cn/usr/uploads/2013/09/3308718845.pdf 中的第99题。 完整叙述如下: one player conceals a 10 or 20 copeck coin, and the other guesses its value. if he ** right he gets the coin, if wrong he pays 15 copecks. ** th** a fair game? what are the optimal mixed strategies for both players? (甲藏起一枚10戈比或20戈比的硬币,乙猜这枚硬币的钱数。乙猜对则得到甲的硬币,猜错则要给甲15戈比。这是否… 20210311