已知[img=184x23]18030bf21d79110.png[/img]，则[img=33x26]18030bf2255153a.png[/img]
A: [img=203x21]18030bf22e1f4d1.png[/img]
B: [img=173x24]18030bf2375b9ed.png[/img]
C: [img=260x21]18030bf24013517.png[/img]
D: [img=203x21]18030bf248d33b3.png[/img]
E: [img=260x21]18030bf251797f7.png[/img]
A: [img=203x21]18030bf22e1f4d1.png[/img]
B: [img=173x24]18030bf2375b9ed.png[/img]
C: [img=260x21]18030bf24013517.png[/img]
D: [img=203x21]18030bf248d33b3.png[/img]
E: [img=260x21]18030bf251797f7.png[/img]
举一反三
- 已知[img=184x23]1802f669b83a91a.png[/img]，则[img=33x26]1802f669c067096.png[/img] A: [img=203x21]1802f669ca57926.png[/img] B: [img=173x24]1802f669d4a9419.png[/img] C: [img=260x21]1802f669dc9fd2e.png[/img] D: [img=203x21]1802f669e50febb.png[/img] E: [img=260x21]1802f669ee000bf.png[/img]
- 已知[img=184x23]1802e54facd198b.png[/img]，则[img=28x26]1802e54fb5bd685.png[/img] A: [img=203x21]1802e54fbea3ac9.png[/img] B: [img=173x24]1802e54fc71fadc.png[/img] C: [img=260x21]1802e54fceba040.png[/img] D: [img=203x21]1802e54fd719122.png[/img] E: [img=260x21]1802e54fdfb2531.png[/img]
- ${\bf P}(X=4)=\,$ ${\bf P}(X=3)=\,$ ${\bf P}(X=2)=\,$ ${\bf P}(X=1)=\,$______
- ${\rm var}(X)=\,$ ${\bf E}[X]=\,$ ${\bf P}(X=3)=\,$ ${\bf P}(X=-2)=\,$ ${\bf P}(X=1)=\,$ ${\bf P}(X=0)=\,$______
- ${\bf P}(X=-2)=\,$ ${\bf P}(X=1)=\,$ ${\bf P}(X=0)=\,$______