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Gmat Pref : avarages

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Gmat Pref : avarages

by drgmatIL » Tue Aug 12, 2008 3:11 am
I know it cannot be 140 or 130. it must be under the avarage
I took for example the situation when all the spices are 140 and the shortest is 60
so median is 140 ; avarage 124
but why 90 is wrong?

thanks
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by sudhir3127 » Tue Aug 12, 2008 3:21 am
it has to be 100.

total is 124*5 = 620.

if 3 are of 140 = 3*140 =420.

thus with 2 woods u need to make it 200.( 620-420)

u can either choose 90 for the smallest and other one as 110.

but

u can also choose the two to be 100 each .

the question stem asks u for the maximum possible length of the shortest wood.

hence it shud be 100.

hope it helps...
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by drgmatIL » Tue Aug 12, 2008 3:22 am
sudhir3127,
thanx!!!!!!
greetings from IL
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