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DS - Number list

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DS - Number list

by AJ1440 » Wed Oct 12, 2011 7:14 pm
Hi

Are all of the numbers in a certain list of 15 numbers
equal?
(1) The sum of all the numbers in the list is 60.
(2) The sum of any 3 numbers in the list is 12.

Thanks!
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by shankar.ashwin » Wed Oct 12, 2011 7:22 pm
(1) You could have any set of 15 numbers adding up to 60. Insuff
(2) Since any 3 numbers in the list add up to 12, the numbers should be equal and should all be =4. Suff.

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by GMATGuruNY » Thu Oct 13, 2011 3:29 am
I posted an explanation here:

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