Question: Jets Fans in a Dormitory

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How did you get 5/12
gmat-admin's picture

Good question.

When we add the given fractions we get 7/12

So, up to that point, have have only accounted for 7/12 of the students. Since 7/12 + 5/12 = 12/12 = 1, we can conclude that, if 7/12 of the students are accounted for, then 5/12 of the students are NOT accounted for.

Does that help?

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