1. The problem statement, all variables and given/known data Given a quantum density ρ=w1|φ1><φ1|+w2|φ2><φ2| where φ1=c(1/2)*exp[-(x-b)2/2c2] φ2=c(1/2)*exp[-(x+b)2/2c2] find the density of probability of finding x0 if X(operator) is measured 2. Relevant equations PA=Σwi(Σ|<a;α|φi>|2) 3. The attempt at a solution I know that the probability of measuring a x0 is Tr(ρΣ|x0><x0|), but I don't know how to calculate the projector. All help is welcome.