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M12 Q14

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Manager
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M12 Q14 [#permalink] New post 01 Jul 2012, 06:14
If the mean of set S is 20, what is the median of set S ?

In set S there are as many numbers larger than 20 as there are numbers smaller than 20.
All numbers in set S are even integers.


I used number testing to solve this problem but took me a really long time to figure out the right set of numbers. Can someone please suggest how to quickly come up with the right type of sets (numbers to be tested) for such problems.

This problem took me more than 3 minutes to solve, does anyone know some quick method to solve it or strategic guess?

Last edited by teal on 05 Jul 2012, 19:14, edited 1 time in total.
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Affiliations: Project Management Professional (PMP)
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Re: M12 Q14 [#permalink] New post 02 Jul 2012, 04:59
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teal wrote:
If the mean of set S is 20, what is the median of set S ?

In set S there are as many numbers larger than 20 as there are numbers smaller than 20.
All numbers in set S are even integers.


I used number testing to solve this problem but took me a really long time to figure out the right set of numbers. Can someone please suggest how to come up with the right type of sets (numbers to be tested) for such problems.


The set may or may not contain negative numbers.. hence E
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Manager
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Joined: 13 May 2010
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Re: M12 Q14 [#permalink] New post 05 Jul 2012, 19:18
please help!! I still don't get it ....thanks, Vaibhav, for posting reply.
Re: M12 Q14   [#permalink] 05 Jul 2012, 19:18
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