1. The problem statement, all variables and given/known data If I have two Einstein solids A and B with oscillators N_A N_B and they share a total of 20 energy units. I want to find the width of the function that describes the multiplicity for this system. How do I find this? - I have an expression in my book (Thermal Physics by Schroeder), where the width is given as q/sqrt(N), where q is the energy units and N is the number of oscilators of one of the systems A and B - but in that example, A and B have the same number of oscillators N. I was just wondering how it is when they have a different amount.