I have a random set $\{a,b,c\}$ and a second set $\{e,d\}$ I draw one number first number and one from the second
Letting $X_1$ denote the first number and $X_2$ the second number find, $E(X_1)$ and $E(X_2)$ and $E(X_1+X_2)$
Please please help, it might be obvious but I just can't work it out!