Two distinct integers, $x$ and $y$, are randomly chosen from the set $/{1,2,3,4,5,6,7,8,9,10/}$. What is the probability that $xy-x-y$ is even?
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Create a stem-and-leaf plot for the data set. Enter rows of numbers corresponding to the stems and leaves. 77, 81, 85, 88, 89, 90, 92, 95, 97, 100, 100
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