Answer :
Final answer:
The complement of the event that 75% of fitness magazine subscribers are over 38 is that 25% of the subscribers are 38 or younger.
Explanation:
In probability, the complement of an event is the occurrence of the opposite of that event. In the scenario described, evidently, 75% of the subscribers to the fitness magazine are over the age of 38. Therefore, the complement of this event is the remaining percentage of subscribers who are not over the age of 38, or in other words, those who are 38 or younger.
So, the complement would be 100% (total percentage) - 75% (percentage over 38) = 25%. Thus, 25% of the subscribers to the fitness magazine are 38 or younger.
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I think that the complement of the event "75% of subscribers to a fitness magazine are over the age of 38" would be "25% of subscribers to a fitness magazine are under the age of 38."