posted by Jen .
A company produces three types of color TVs: Models X, Y and Z. Each model X requires 2 hours of electronic work and 2 hours of assembly work. Each Y model requires 1 hour of electronic work and 3 hours of assembly work. Each model Z requires 3 hours of electronic work and 2 hours of assembly work. They have available a 100 hours of work per week, for each type of work, electronic and assembly. How many televisions of each model should be produced each week if they use all available time?