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35
1
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Given that $a$ and $b$ are real numbers such that $-3\leq a\leq1$ and $-2\leq b\leq 4$, and values for $a$ and $b$ are chosen at random, what is the probability that the product $a\cdot b$ is positive? Express your answer as a common fraction.

 Aug 11, 2021
 #1
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7*5 = 35.  Then (3*2) + 4 = 10, so the probabiity is 10/35 = 2/7.

 Aug 11, 2021

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