Suppose two dice (one red, one green) are rolled. Consider the following events. A: the red die shows 1; B: the numbers add to 3; C: at least one of the numbers is 3; and D: the numbers do not add to 8. Express the given event in symbolic form. The numbers do not add to 3. O B O D OD' OB' O B'UD How many elements does it contain?

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