What are the chances of a coin landing on heads?
硬幣是頭朝上還是字朝上?

It isn't fifty-fifty. If the coin is heads up to begin with, it's more likely to land on heads. Students at Standford University recorded thousands of coin tosses with high-speed cameras and discovered the chances are approximately fifty-one to forty-nine.
拋硬幣的概率并不是50比50. 如果硬幣是頭朝上往上拋,那么很有可能掉下來時也是頭朝上。斯坦福大學的學生們用高速攝像機拍下了數千次拋硬幣的過程,發現頭朝上和字朝上的概率大約為51比49.