In 2007, Starbucks inaugurated its Dulce de Leche Latte. If

In 2007, Starbucks inaugurated its Dulce de Leche Latte. If 8% of all customers who walk in order the new drink, what is the probability that out of 13 people, at least 1 will order a Dulce de Leche Latte? What assumption are you making?