关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 关注微信公众号《课帮忙》查题 公告:维护QQ群:833371870,欢迎加入!公告:维护QQ群:833371870,欢迎加入!公告:维护QQ群:833371870,欢迎加入! 2021-04-14 若X~N(3,0.2),Y~N(2,0.3),且X与Y相互独立,则X+Y~ 若X~N(3,0.2),Y~N(2,0.3),且X与Y相互独立,则X+Y~ 答案: 查看 举一反三 若X~N(3,0.2),Y~N(2,0.3),且X与Y相互独立,则X+Y~( ) A: N(5,0.5) B: N(5,0.1) 若X~N(3,0.2),Y~N(2,0.3),且X与Y相互独立,则X+Y~( ) A: N(5, 0.1) B: N(5, 0.5) C: N(1, 0.1) D: N(1, 0.5) 若X~P(0.2),Y~P(0.3),且X与Y相互独立,则X+Y~ 若X~B(3,0.2),Y~B(5,0.2),且X与Y相互独立,则X+Y~B(8,0.2). ( ) 若X~B(3,0.2),Y~B(5,0.2),且X与Y相互独立,则X+Y~B(8,0.4).