Problem
A dessert shop launches two products: Tiramisu and Chocolate cake. The shop determined over a period of an year to find out 20% of people buy none of the desserts, 55% buy only Tiramisu, 25% buy both of these and these percentages are relatively constant from one year to another. If there is a total of 300 consumers, how many of these two desserts should the dessert shop sell to them? Answer the question, mention the steps you took and how you got the answer.
• How much revenue did the dessert shop make in an year?
• How much average revenue did the dessert shop make? Is this the expected value E(X)?