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求P(X=1,Y=1)的值为
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发布时间:2022年04月20日
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求P(X=1,Y=1)的值为
(2)、求P(X=3|Y=1)的值
设(X,Y)的取值为(0,0),(0,1),(1,0),(1,1),已知P(X=0,Y=0)=0.4, P(X=0,Y=1)=P(X=1,Y=0)=P(X=1,Y=1)=k,则k的值为
0.2 a 0.2(1) 求 a ;(2) 求 P X 0,Y 1 , P{Y 1| X 5} ;(3) 求 X ,Y 的边缘分布律;(4) 求 (5) 判断 X ,Y 是否独立。
设随机变量(X,Y)概率密度为(1)确定常数k。 (2)求P {X<1, Y<3}(3)求P (X<} (4)求P (X+Y≤4}分析:利用P {(X, Y)∈G}=
设(X,Y)的联合分布律为 P{X=0,Y=0}=0.2, P{X=0,Y=1}=0.3, P{X=1,Y=0}=0.4, P{X=1,Y=1}=0.1, 求(1)X的边缘分布律;(2)P{X=0|Y=0}。 (30.0分)
 x  2, 2  y  4其他⏺(1)确定常数 k;(2)求 P{X  1,Y  3};⏺(3)求 P{X  1.5};(4)求 P{X  Y  4}。⏺ 
设xy – x + y = 5,求 ( x + 1 ) ( y – 1 ) 之值 =__。
設xy – x + y = 5,求 ( x + 1 ) ( y – 1 ) 之值 =__。
设随机变量X和Y独立同分布,且P(X=-1)=P(Y=-1)=P(X=1)=P(Y=1)=1/2试求P(X=Y
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