作者msu (do my best)
看板Grad-ProbAsk
标题[理工] [机率]-请问一题
时间Sat Nov 7 20:02:46 2009
请问一题
The joint probability density function of random variables X and Y is
given by
1 (x^2 +y^2 -6x +2y +10)
f(x,y)= --- exp{ _ -----------------------} , -无穷< x,y < 无穷
8pi 8
(a) Find P{X >3 | Y>0}
(b) Find E{Y|V<=2}
(c) Find Var(X+Y)
请问如何解呢?
感谢
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