1. The problem statement, all variables and given/known data Consider the distribution function F(x) = Cexp(-ax) Find the normalization constant C 2. Relevant equations 3. The attempt at a solution This is more clarification since this is not actually a homework problem but was in my profs notes. He started with the distribution function above and said we were to determine C. He then gave us the average equation below: <z> = ∫ z f(z) dz / ∫ f(z) dz Which in this case would be xexp(-ax) / exp(-ax) I am a little confused as to how you are able to determine the constant C if you determine the average of the system/distribution.