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mean (probabiltity)

Problem Solving — algebra and arithmetic (GMAT Focus Edition)
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by manpsingh87 » Sat Apr 23, 2011 12:04 am
marmar29 wrote:please help in solving ths q.

THE MEAN WEIGHT OF A GROUP OF 11 MEN IS 70KG . WHT IS THE MEAN WT OF THE REMAINING GP WHN A MAN 90KG LEAVES??
let total weight of 11 men=x;
therefore we have x/11=70; x=770;
now when 90 kg man leaves the group,remaining number of men will be 10 and their mean weight can be given as
x-90/10=770-90/10=68
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by Brent@GMATPrepNow » Sat Apr 23, 2011 6:52 am
marmar29 wrote:please help in solving ths q.

THE MEAN WEIGHT OF A GROUP OF 11 MEN IS 70KG . WHT IS THE MEAN WT OF THE REMAINING GP WHN A MAN 90KG LEAVES??
Hi marmar29,

Please provide answer choices when posting questions.
There are many instances on the GMAT when one can use the answer choices to quickly find the correct answer without performing lengthy calculations.

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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