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OG Data Sufficiency

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by Striver » Tue May 29, 2012 3:35 pm
Can anyone help explain the following:

#141
Committee X and Committee Y, which have no common members, will combine to form Committee Z. Does Committee X have more members than Committee Y?

1) The average (arithmetic mean) age of the members of Committee X is 25.7 years and the average age of the members of Committee Y is 29.3 years.

2) The average (arithmetic mean) age of the members of Committee Z will be 26.6 years.
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Source: — Data Sufficiency |

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by Mike@Magoosh » Tue May 29, 2012 3:48 pm
Hi, there. I'm happy to help. :)

Here's a video solution I've created to that problem.
https://www.youtube.com/watch?v=iH5hR1FajVg

On that YouTube channel, you will find a video solution for each and every Quant question in the OG.

Let me know if you have any further questions.

Mike :)
Magoosh GMAT Instructor
https://gmat.magoosh.com/
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by vikramk1986 » Tue May 29, 2012 7:43 pm
Good one... i like the way u solved it...
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by Striver » Wed May 30, 2012 4:01 pm
Thank you Mike! You make it seem so simple. :D
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