关于我国硬币面值的问题
摘 要
关键词 : 硬币； 面值； 期望 ；方差
Some Problems of Chinese Coin face value
Abstract
As we all know, the Chinese coin face valve are one fen, two fen, five fen, one Jiao, two Jiao and Five Jiao. Whether the design of this coin face value is reasonable? in this paper, according to the results of Submarket investigation, we mainly discuss some problems of Chinese coin face value with the knowledge of probability statistics. With the demand of the minimum mathematical expectation of design, we find that the Present coin design item of China is not the best one.
Key words: coin, face value, mathematical expectation, variance.