Question: 39 Susan Williams has been the production manager of Medical Suppliers, Inc., for the past 17 wars. Medical Suppliers, Inc, is a producer of bandages and arm slings. During the past 5 years, the demand for Non Stick bandages has been fairly constant. On the average, sales have been about 87,000 packages of No-Stick. Susan has reason to believe that the distribution of No-stick follows a normal curve, with a standard deviation of 4,000 packages. What is the probability that sales will be less than 91,000 packages?