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Metropolitan Concert Hall was half full on Tuesday night.

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by Mike@Magoosh » Tue Sep 10, 2013 3:36 pm
Metropolitan Concert Hall was half full on Tuesday night. How many seats are in the Hall?

Statement (1): If the number of people in the Hall increased by 20% from Tuesday night to Wednesday night, then the Hall would be 60% full on Wednesday night.

Statement (2): If 20 more people showed up on Tuesday night, that would have increased the number of people in the Hall by 4%.

For more practice problems, a discussion of Ratios & Proportions on the GMAT, and the answer & explanation for this particular question, see:
https://magoosh.com/gmat/2013/gmat-quant ... oportions/

Mike :-)
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https://gmat.magoosh.com/
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Source: — Data Sufficiency |
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by Java_85 » Tue Sep 10, 2013 5:29 pm
IMO B
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by TheGmatTutor » Tue Sep 10, 2013 6:40 pm
I agree with Java_85.

1) Multiple possible solutions, so Insufficient
2) Can solve for a single value of seats in the hall, so Sufficiency

Answer B
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