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Should start completing the square by figuring out what the square will be ( (x + 2)² )Figure out what should be added/taken away from the square to complete it by mu...

Brief overiew of the answer: Since the roll is even, we either rolled a 2, a 4 or a 6, all with equal probabilities. Therefore, the probability we rolled a 2 is equal to 1/3.Formal answer: We write P(2|E)...