Calculate the probability that the product of two numbers...
Calculate the probability that the product of two numbers selected at random with replacement from the set {-5,-2,4, 8} is positive
23
12
13
16
Correct answer is B
x -5 -2 4 8
-5 25 10 -20 -40
-2 10 4 -8 -16
4 10 4 -8 -16
4 -20 -8 16 32
8 -40 -16 32 64
Pr(Two numbers is positive) = 816
= 12
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