The random variable X may take the values (1,2,3) and the random variable Y may take the values (0,1,2).
The joint distribution function of X and Y is P(x,y)=xy/18
a) what is the probability that Y=0?
b) what is the probability that X=1?
c) Are X and Y statistically independent? why or why not?
d) what is the probability that Y=2, given that X is greater and equal to 2?
나 a는 0 하고 b는 5/18 했는데 확실하지 않구 c랑 d를 모르겠어 ㅠㅠ
c는 independent가 아닌거같은데 증명 할 방법을 모르겠네 ㅠㅠ 그냥 X랑 Y가 교차점이 있다하면 되려나 ?
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