1. The problem statement, all variables and given/known data Prove that E(X) > a.P(X>a) 2. Relevant equations E(X) is expectation, a is a positive constant and X is the random variable. (Note, > should be 'greater than or equal to' but I'm not too sure how to do it) 3. The attempt at a solution Well I can show it easy enough for X~Exp(h), but of course this is not a general proof. And I played around a bit with P(X>a)=1-F(a) where F is the cdf, but yeah. That's all I could really do. I just don't really get how the a factor comes in.