Re: DSE 2006 Q34

Posted by Kuldeep on Jun 13, 2013; 3:23pm
URL: http://discussion-forum.276.s1.nabble.com/DSE-2006-Q34-tp7582203p7582280.html

Var [2(x1-x2)]= 4var(x1-x2)=var (x) + var(y) + 2 cov (xy)
Cov x,y = 0..... Solve the above you would get Var [(x1-x2)]=128