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提问人:网友bixkjwfnh
发布时间:2022-01-06
[主观题]
A.Study a weather map.B.Visit a weather station.C.Listen to a weather report.D.Go to a
A.Study a weather map.
B.Visit a weather station.
C.Listen to a weather report.
D.Go to a storm shelter.
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查看官方参考答案
A.Study a weather map.
B.Visit a weather station.
C.Listen to a weather report.
D.Go to a storm shelter.
设A、B为两随机事件,且B⊂A,则下列式子正确的是( ).
A.P(A+B)=P(A) B.P(AB)=P(A)
C.P(B|A)=P(B) D.P(B-A)=P(B)-P(A)
令
求(I)二维随机变量(X,Y)的概率分布;
(II)X与Y的相关系数;
(III)Z=X2+Y2的概率分布
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