高射炮打飞机中的1些概率问题
摘要关键词：随机事件；独立性；数学期望。
Some problems of probability about
that high bullets shoot aeroplanes
ABSTRACT
The problem about high bullets shoot aeroplanes is a very important realitic problem of military affairs .This essay ,using intellectual of probability ,inquires into how to dipose firepower when we use high bullets to shoot aeroplanes ,and gets two major interesting conclusions.First, we should use firepower equally when the percentage of hits of each bullet is the same. Secend,when the percentage of hits of each bullet is different,we should use firepower according to power root of k(K refers to the number of the aeroplane).
Keywords:random event;independence;expectation of mathmatics.