设[img=184x61]1803b363fb9d5ad.png[/img],则[img=83x34]1803b36402ffdd5.png[/img]_______
举一反三
- 设随机变量x的分布函数[img=165x85]17e446b194f8c30.png[/img],则P(X=5)=
- 设f(x)为连续函数,且 [img=217x49]18034a50d8b1b92.png[/img] 则[img=70x25]18034a50e196c62.png[/img] A: 5 B: 4 C: 0 D: -5
- 设随机变量X服从参数为λ的泊松分布,且P(X=1)=P(X=2),则P(X≥2)的值为 A: [img=98x35]1803b3b9dd898d4.png[/img] B: [img=83x34]1803b3b9e54cd40.png[/img] C: [img=96x34]1803b3b9ec7f1a2.png[/img] D: [img=43x35]1803b3b9f46e15d.png[/img]
- 设随机变量[img=99x39]1802e2aa37f8c6a.jpg[/img],则E(X)=( ). A: [img=11x33]1802e2aa410560f.jpg[/img] B: [img=11x33]1802e2aa49bc493.jpg[/img] C: [img=18x33]1802e2aa51fb455.jpg[/img] D: 5
- 设随机变量X的分布函数[img=205x105]18036a5299019c9.png[/img] 则P(X=5)=2/3.