At Flo’s Pancake House, pancakes can be ordered with any of six possible toppings. How many different ways are there to order pancakes with three toppings?
A.20
B.40
C.54
D.120
E.720
我的答案：
At Flo’s Pancake House, pancakes can be ordered with any of six possible toppings. How many different ways are there to order pancakes with three toppings?
