A die is rolled twice. Write the indicated event in set notation.The sum of the rolls is either 9 or 5, and one roll is a 4.
A. {(4, 5), (4, 1)}
B. {(4, 5), (4, 1), (5, 4), (1, 4)}
C. {(5, 4), (1, 4)}
D. {(4, 5), (5, 4)}
Answer: B
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A. 
B. 
C. 
D. 
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What will be an ideal response?