• 2022-06-19
    设随机变量X服从[img=54x25]1803b415351d113.png[/img],Y服从[img=54x25]1803b4153d83ded.png[/img],且它们相互独立,则下列结论成立的是
    A: [img=139x43]1803b415454c305.png[/img]
    B: [img=139x43]1803b4154cc25bd.png[/img]
    C: [img=139x43]1803b41554cfbc6.png[/img]
    D: [img=139x43]1803b4155cd17aa.png[/img]