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If x is chosen at random from the set {1,2,3,4} and y is chosen at random from the set {5,6,7,8}, what is the probability x*y is divisible by 4?

Explanation

Total samples in the sample set are 16, and (1,8), (2,6), (2,8), (3,8), (4,5), (4,6), (4,7), (4,8) are required, so 16/8 = 1/2.

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