Hello, i need some help with an assignment.
we have two random variables x1 and x2. E[x1]=E[X2]=1, VAR[X1]=4 and VAR[X2]=5.
I think I have to just do this:
1/3(3*VAR[X1]+6*VAR[X2]) and get: 1/3(3*4+6*5)=14
Can anyone confirm or explain my...