Two events are mutually exclusive if: the occurrence of one of the events means that the other event must also occur. both events occur to the exclusion of all other events. the occurrence of one event means the other can't occur at the same time.

The correct answer is: the occurrence of one event means the other can't occur at the same time.<br /><br />Explanation: Two events are mutually exclusive if they cannot occur at the same time. In other words, if one event occurs, the other cannot happen. This means that the occurrence of one event excludes the possibility of the other event occurring.