Answer
I) 124
Work Step by Step
$164+208=372$ members either lift weights, perform cardio, or do both.
Since there are only 248 members, $372-248=124$ members must do both.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.