Suppose you roll a pair of dice. Let A be the event that you observe a number smaller than 9. Let B be the event that you observe a number greater than 6. Choose the most appropriate statement: O A° and B° are mutually exclusive. O Ac and Bº are collectively exhaustive and mutually exclusive. O A° and Bº are not mutually exclusive. O A° and Bº are collectively exhaustive.

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