Question:
Two standard six-faced dice are rolled. Jean wins if the product of the two numbers rolled is odd or a multiple of three, otherwise Allen wins. What is the probability that Jean wins? Express your answer as a common fraction.

Answer:
When two dice are rolled, there are 36 total outcomes. Let's compute the probability that Allen wins. Allen wins if the product of the two numbers is even and not a multiple of 3. In other words, Allen wins if the product is 2 $(1\cdot2, 2\cdot1)$, 4 $(1\cdot4, 4\cdot1, 2\cdot2)$, 8 $(2\cdot4, 4\cdot2)$, 10 $(2\cdot5, 5\cdot2)$, 16 $(4\cdot4)$, or 20 $(4\cdot5, 5\cdot4)$. Therefore, the probability that Allen wins is $\frac{2+3+2+2+1+2}{36}=12/36=1/3$. Then, the probability that Jean wins is $1-1/3=\boxed{\frac{2}{3}}$.