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Instructions

Consider the $$6 \times 6$$ square in the figure. Let $$A_1, A_2, \ldots, A_{49}$$ be the points of intersections (dots in the picture) in some order. We say that $$A_i$$ and $$A_j$$ are friends if they are adjacent along a row or along a column. Assume that each point $$A_i$$ has an equal chance of being chosen.

Question 17

Two distinct points are chosen randomly out of the points $$A_1, A_2, \ldots, A_{49}$$. Let $$p$$ be the probability that they are friends. Then the value of $$7p$$ is

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Correct Answer: 0.50

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