随机变量X~B(n,p),且E(X)=6,D(X)=3.6,则n=
A.6
B.12
C.15
D.18
正确答案是C
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/923213.html
上一篇:下列各项中,影响年末未分配利润余额的有()。
下一篇:【阅读判断】On a Monday morning in July, the world's first atom bomb exploded in the New Mexico desert. Forty seconds later, the shock waves reached the base camp where the Italian-American physicist Enrico Fermi and his team stood. After a mental calculat