摘要
讨论一种离散型随机变量的分布,得到了此种随机变量的概率分布以及该分布的数学期望与方差,并验证了该分布应满足的必要条件.
A kind of discrete random variable distribution is studied. The mathematical expectation and variance are obtained for the distribution of the random variable, and necessary condition of the distribution is tested.
出处
《大学数学》
北大核心
2008年第6期177-179,共3页
College Mathematics
关键词
随机变量
概率分布
排列组合
random variable
probability distribution
permutation and combination
