A = {2,0, 1, -3, 6, -8}
B = {-1, 2, -4, 7,-6,20}
If a is a number that is randomly selected from Set A, and b is a number that is randomly selected from Set B, what is the probability that ab > 0?  Answers: A) 1/4 B) 1/3 C) 5/12 D) 4/9 E) 1/2
For the product of 2 numbers to be positive either both of them must be positive or both of them must be negative:   P(positive, positive) = 3/6*3/6 = 9/36;   P(negative, negative) = 2/6*3/6 = 6/36.   P = 9/36 + 6/36   = 15/36   = 5/12.   Answer: 5/12.
<result>C</result>
A = {2,0, 1, -3, 6, -8}
B = {-1, 2, -4, 7,-6,20}
If a is a number that is randomly selected from Set A, and b is a number that is randomly selected from Set B, what is the probability that ab > 0?