Can you please help me figure this out? Thanks.
Suppose managers at a company wish to meet the increasing demand for color photocopies and to have more reliable service. Based on historical data, the chance that a black-and-white copier will be down for repairs is 0.12. The color copiers are more of a problem and are down 23% of the time. As a goal, they would like to have at least a 99.90% chance of being able to furnish a black-and-white copy or a color copy on demand. They also wish to purchase only four copiers. They have asked for advice regarding the mix of black-and-white and color copiers. Supply them with advice on how to purchase the greatest number of color copiers while also meeting their goal regarding the furnishing of a copy on demand. Provide calculation and reasons to support that advice. (Assume that the color copier can also be used to make a black-and- white copy.)
The manager should purchase
black-and-white copier(s) and
color copier(s). If they do this, they will have a ____ % chance of being able to furnish at least a black-and-white copy or a color copy on demand.