Hopping Rabbit

Discrete Mathematics Level pending

A rabbit hops up a 7-step staircase. In each hop the rabbit can climb either 1 or 2 steps. What is the number of different ways in which the rabbit can go upstairs ? (the order of hops matters , e.g. a 1-step hop followed by a 2-step hop is considered different from the same hops in reverse order)

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