• 2022-06-29
    设袋中有4只白球和2只黑球,先从袋中无放回地依次摸出2只球,则这2只球都是白球的概率是( ).
    A: [img=9x43]1803951f59d9b29.png[/img]
    B: [img=9x43]1803951f628361c.png[/img]
    C: [img=9x43]1803951f6a20d74.png[/img]
    D: [img=9x43]1803951f7168df0.png[/img]