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Given the sets A = [2, 4, 6, 8] and B = [2, 3, 5, 9]. If ...

Given the sets A = [2, 4, 6, 8] and B = [2, 3, 5, 9]. If a number is picked at random from each of the two sets, what is the probability that their difference is 6 or 7?

A.

1256

B.

116

C.

18

D.

12

Correct answer is C

235920137421156431386531

Note: A {horizontal}

B {vertical}

Pr(Difference of 6 or 7) = 216=18