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8. A Chinese Pie Stand offers a delicious triangular shaped, chewy, green onion pie. You can also order the pie with any or all of 4 luxurious toppings: heavenly beef, earthly chicken, salty ocean fish, and spicy insanity crazy chili. How many ways can a pie be ordered?

Respuesta :

15

(beef)
(chicken)
(fish)
(chili)

(beef, chicken)
(beef, fish)
(beef, chili)

(chicken, fish)
(chicken, chili)

(fish, chili)

(beef, chicken, fish)
(beef, fish, chili)
(beef, chicken, chili)
(chicken, fish, chili)

(beef, chicken, fish, chili)

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