Managerial Economics & Business Strategy 8th Edition by Michael Baye,Jeff Prince

Exercise 14

When trying to assess differences in her customers, Claire-the owner of Claire's Rose Boutique-noticed a difference between the typical demand of her female versus her male customers. In particular, she found her female customers to be more price sensitive in general. After conducting some sales analysis, she determined that her female customers have the following demand curve for roses:
is the quantity of roses demanded by a male customer. If two unaffiliated customers walk into her boutique, one male and one female, determine the demand curve for these two customers combined (i.e., what is their aggregate demand?).