11. The stylists in a hair salon cut hair for women and men. The salon books at least four women's appointments for every an's appointment.
Usually there are 90 or more appointments, in total, during a week
The salon is trying to reduce the number of hours the stylists work
A woman's cut takes about 75 min, and a man's cut takes about 30 min.
What combination of women's and men's ppointments would minimize the number of hours the stylists work? How many hours would this be?