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1.假设有n个人戴着黑色的帽子,则这n个人中的某一个人能看到有(n-1)个人戴着黑色的帽子,但他并不知道自己戴的是什么颜色的帽子.直到第(n-1)次关灯还没有人拍掌,则他可以由此推断出自己戴的是黑色的帽子.对于其他戴黑色帽子的人来说也是如此.因此有3个人戴着黑色的帽子.2.B、C、D的选票共有44-23-4=17(张),C、D的选票至少各有5张.如果C、D的选票都是6张,那么B的选票是5张,这不合题意.所以,C、D的选票都是5张,B的选票是17-5×2=7(张).3.因为袜子不分左右脚,所以可将每对袜子都拆成两只,他们二人各拿一只.
1. Assuming that n individuals wear black hats, one of the n individuals can see that (n-1) individuals wear black hats, but he does not know what color hats they wear It was not until the (n-1) th turn off that no one clapped his hand, so he could deduce that he was wearing a black hat, as was the case for the other people wearing black hats, so three people weared Black hat .2.B, C, D votes a total of 44-23-4 = 17 (Zhang), C, D votes each have at least 5. If C, D votes are 6, then B’s The votes are 5, which is not appropriate. So, C, D’s votes are 5, B’s votes are 17-5 × 2 = 7 (Zhang) .3. Because the socks regardless of left and right feet, so every The socks are split into two, each of them take one.