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If x,y can take values from the set (1,2,3,4),find the probability that the product of x and y is not greater than 6?

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how many products xy are there? Just list them:
1,2,3,4,2,4,6,8,...
How many unique products are there? (delete duplicates)

how many xy <= 6?
Now just divide to find the probability.

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