Calculate the probability that the product of two numbers selected at random with replacement from the set {-5,-2,4, 8} is positive
- \(\frac{2}{3}\)
-
\(\frac{1}{2}\)
- \(\frac{1}{3}\)
- \(\frac{1}{6}\)
The correct answer is: B
Explanation
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) = \(\frac{8}{16}\)
= \(\frac{1}{2}\)