An amusement park has 20 rides. Ethan has enough time to ride 3 rides before the park closes. How many different ways could Ethan pick to ride the 3 rides?
Andy C.
answered 06/20/18
Math/Physics Tutor
20*19*18 = 6840
UNLESS............... he is allowed to ride the same ride again , over and over.... then it is 20 x 20 x 20 = 8000
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