At a fast food burrito restaurant, customers ask servers to add particular ingredients to their burrito. one popular ingredient is guacamole. on average, a server puts 2.2 ounces of guacamole in each burrito. the total weight in a batch of guacamole is 80 ounces. if 25 servings of guacamole have been sold from a batch, about how much guacamole, in ounces, would you expect to still be available? (suppose the servings of guacamole are independent.)