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For a set \(X\) containing \(n\) integers, is the mean even?

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by BTGmoderatorLU » Tue Jul 09, 2019 3:40 am

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A

B

C

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E

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Source: Manhattan Prep

For set \(X\) containing \(n\) integers, is the mean even?

1. \(n\) is even.
2. All of the integers in set \(X\) are even.

The OA is E
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Source: — Data Sufficiency |

by Ian Stewart » Tue Jul 09, 2019 6:56 am
If the set is {2, 4}, the mean is 3, so is odd, and if the set is {2, 6}, the mean is 4, so is even. So using both Statements we cannot answer the question and the answer is E.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

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