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Weighted averages

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Weighted averages

by gmatrant » Wed Aug 04, 2010 5:51 pm
A group of men and women gathered to compete in a marathon. Before the competition, each competitor was weighed and the average weight of the female competitors was found to be 120 lbs. What percentage of the competitors were women.

1) The average weight of the men was 150 lbs
2) The average weight of the entire group was twice as close to the average weight of the men as it was to the average weight weight of the women.
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Source: — Data Sufficiency |
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by selango » Wed Aug 04, 2010 7:49 pm
gmatrant,

Check the below link,

https://www.beatthegmat.com/700-challeng ... -t282.html

Pls let me know if u still have doubts..
--Anand--
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by blaster » Thu Aug 05, 2010 1:19 am
B is sufficient.
here we need just a percent ( or proportion) and B gives that information.
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by pradeepkaushal9518 » Thu Aug 05, 2010 5:52 am
A is not sufficient as it doesnt give percentage. so AD out left bce

option b can give percentage hence B is sufficient

hence B
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