I am working on this problem and I don't really know what to do. I am really struggling in this class.
A bag contains n balls numbered 1, 2, 3, ....n. Two of them are taken out of the bag (without replacement). Let X be the maximum value among the two selected balls.
(a) Find the mean E(X) when n=5.
(b) Generalize to any n.
I know the formula for Expectation is ∑xP(X=x)
I just don't know what to do.
Thanks for any help.