Question: Pizza

Leo has a pizza business. The times to prepare and deliver pizzas are approximately normally distributed with a mean μ = 25 minutes and standard deviation σ = 10 minutes.

a. Suppose that Leo advertises “If it takes more than 40 minutes to get your pizza, you get it free”. What percentage of his take-out pizzas will he have to give away free? SW

b. How long a time should Leo allow if he wants to give away no more than 5% of the pizzas? SW