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Checkerboard Random Square Color

1100BeginnerCombinatoricsProbability

AMC 8 · 2009 · Problem 10

On a checkerboard composed of 64 unit squares, what is the probability that a randomly chosen unit square does not touch the outer edge of the board? [Asymptote diagram]

Answer choices

A
\frac{1}{16}
B
\frac{7}{16}
C
\frac{1}2
D
\frac{9}{16}
E
\frac{49}{64}
0 students attempted0% solvedRating 1100

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