Maisy is working the counter at Shmaskin Robbins. A hungry customer orders a triple scoop ice cream cone with strawberry, chocolate, and vanilla ice cream.
How many different ways could she stack the ice cream flavors on top of each other?
You could answer the question by listing all of the possible orders of the ice cream (top to bottom).
Or, use factorials to get the answer much faster:
3! = 3 × 2 × 1 = 6
Now, what's the probability that chocolate will be on top?
Two of these combinations have chocolate on top
So the probability is 2 out of the 6 possible combinations: