A与B是两个随机事件,下列哪个事件不表示“A与B至少有一个发生”.
A: [img=61x19]1802d3e811a0259.png[/img]
B: [img=61x22]1802d3e819d2dac.png[/img]
C: [img=48x19]1802d3e82277d3d.png[/img]
D: [img=48x26]1802d3e82ac6e93.png[/img]
E: [img=61x22]1802d3e833d9c5d.png[/img]
F: [img=122x22]1802d3e83c8c09d.png[/img]
G: [img=61x22]1802d3e845702ef.png[/img]
H: [img=95x19]1802d3e84e1d592.png[/img]
A: [img=61x19]1802d3e811a0259.png[/img]
B: [img=61x22]1802d3e819d2dac.png[/img]
C: [img=48x19]1802d3e82277d3d.png[/img]
D: [img=48x26]1802d3e82ac6e93.png[/img]
E: [img=61x22]1802d3e833d9c5d.png[/img]
F: [img=122x22]1802d3e83c8c09d.png[/img]
G: [img=61x22]1802d3e845702ef.png[/img]
H: [img=95x19]1802d3e84e1d592.png[/img]
举一反三
- A与B是两个随机事件,下列哪个事件不表示“A与B至少有一个发生”. A: [img=61x19]1803915d113610e.png[/img] B: [img=61x22]1803915d19a700d.png[/img] C: [img=48x19]1803915d22c7428.png[/img] D: [img=48x26]1803915d2c0a3e3.png[/img] E: [img=61x22]1803915d34ba621.png[/img] F: [img=122x22]1803915d3d2cccc.png[/img] G: [img=61x22]1803915d45c5d7a.png[/img] H: [img=95x19]1803915d4e1f6a6.png[/img]
- X为随机变量,E(X)=-1,D(X)=3,则E(3[img=24x22]1803da40b5dbfd6.png[/img]+20)=( ) A: 18 B: 9 C: 30 D: 32
- X为随机变量,E(X)=-1,D(X)=3,则E(3[img=24x22]1803da40ac7a8ce.png[/img]+20)=( ) A: 18 B: 9 C: 30 D: 32
- X为随机变量,E(X)=-1,D(X)=3,则E(3[img=24x22]1803381b293bffb.png[/img]+20)=( ) A: 18 B: 9 C: 30 D: 32
- X为随机变量,E(X)=-1,D(X)=3,则E(3[img=24x22]17de66bf652c147.png[/img]+20)=( ) A: 18 B: 9 C: 30 D: 32