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no consecutive zeros

GATE CSE & IT · Combinatorics · 2008-2008

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Rosen — Discrete Mathematics and Its Applications

Discrete structures, counting, relations, graph theory

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2008 PYQ

Let $${x_n}$$ denote the number of binary strings of length $$n$$ that contain no consecutive $$0s$$. The value of $${x_5}$$ is

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