更新1:
Can you also answer the following two questions? I just need to check if my answers are correct. 1. The joint probability density function of X and Y is given by f(x,y)= C(y-x) e^(-y) where -y
更新2:
請看我的意見
更新3:
-y
更新4:
i ve posted another question named "Probability pdf questions"
更新5:
please answer that also thanks!!!
更新6:
also for your solution in #3, the expected value will be equals to 0 , because of the negative sign, how come it will become 2/(a+1)(a+2) ?????
更新7:
ohhhh i get it thanks!
更新8:
自由自在 ( 知識長 ): In question #2, why is P(X1 > x/n) , P(X2 > x/n), ..........= (1 - x/n) ??????
