离散型随机变量X的分布列为P{X=k}=ak,k=1,2,3,4。则a=( )
A.0.05
B.0.1
C.0.2
D.0.25
正确答案是B
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明:本文由翰林刷题小程序授权发布,如需转载请注明出处。
本文链接:https://doc.20230611.cn/post/201877.html
上一篇:Vocabulary DevelopmentScan the following passages and find the words or phrases that have roughly the same meanings as those given in the brackets..Paragraph 5.Now as the world’s first truly global market, the NASDAQ Stock Market is the market of cho
下一篇:一般来说,教育实验主要由三个基本要素构成,即:自变量、__________和无关变量。