Two fair dice are thrown. What is the probability that the sum of the numbers is $8$ ?

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Two fair dice are thrown. What is the probability that the sum of the numbers is $6$ ?
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For events $A$ and $B$ , $P (A) = 0.5$ , $P (B) = 0.4$ and $P (A \cup B) = 0.65$ . What is $P (A ∣ B^{'})$ ?
One of two dice is chosen at random. Die $F$ is fair. Die $L$ is loaded so that $P (6) = \frac{1}{2}$ . The chosen die is rolled twice and shows a 6…