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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? Please help! I am trying complementary counting, but failing terribly!

 May 3, 2020
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Here - "https://web2.0calc.com/questions/please-help_10631"

 

coolsmileycool

 May 3, 2020

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