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A point with coordinates $(x,\ y)$ is randomly selected such that $0\leq x \leq10$ and $0\leq

a point with coordinates $(x,\ y)$ is randomly selected such that $0\leq x \leq10$ and $0\leq y \leq10$. what is the probability that the coordinates of the point will satisfy $2x 5y \geq 20$? express your answer as a common fraction.