question from gmatprep

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question from gmatprep

by xcise_science » Sun Dec 02, 2007 12:59 pm
Can someone explain this please?

Thanks

Image
answer is D

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by sujaysolanki » Mon Dec 03, 2007 1:58 am
Nice one ...i used backsolving ..

Say x = 100 ..now pick C 1.2x = 120

20 % of 120 = 24 wont attend ..

So 120 -24 should give x ..

Only D fits in ..

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by xcise_science » Mon Dec 03, 2007 7:41 am
thanks, you're right. I'll make sure to double check any answer that seem to easy.