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counting and probability junior
Problem
Buzz Bunny is hopping up and down a set of stairs, one step at a time. In how many ways can Buzz start on the ground, make a sequence of hops, and end up back on the ground? (For example, one sequence of hops is up-up-down-down-up-down.)
(A)
(B)
(C)
(D)
Solution
Looking at the answer choices, you see that you can list them out. Doing this gets you: Counting all the paths listed above gets you .
Final answer
B