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Muffin/Cake Question - GMATPREP

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Muffin/Cake Question - GMATPREP [#permalink] New post 02 Jun 2006, 11:19
Please see attachment. Please explain the steps.

Thanks
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Re: Muffin/Cake Question - GMATPREP [#permalink] New post 02 Jun 2006, 12:11
axl_oz wrote:
Please see attachment. Please explain the steps.
Thanks


p (B-CB-BM-2CMB) = 30/100 = 3/10

100 = C+M+B-CM-CB-BM-2CMB
100 = 50+40+B-20-CB-BM-2CMB
B-CB-BM-2CMB = 100-90+20
B-CB-BM-2CMB = 30
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Re: Muffin/Cake Question - GMATPREP [#permalink] New post 02 Jun 2006, 17:26
Professor wrote:
axl_oz wrote:
Please see attachment. Please explain the steps.
Thanks


p (B-CB-BM-2CMB) = 30/100 = 3/10

100 = C+M+B-CM-CB-BM-2CMB
100 = 50+40+B-20-CB-BM-2CMB
B-CB-BM-2CMB = 100-90+20
B-CB-BM-2CMB = 30


How are you getting 2CMB?
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 [#permalink] New post 02 Jun 2006, 18:01
My Answer is 3/10. I used Venn diagram.
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 [#permalink] New post 02 Jun 2006, 23:48
yeah use Venn diagram...

no cake or muffin = 100 - (cake + muffin - both)
= 100 - (50 + 40 - 20)
= 30

so answer is 30/100
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Re: Muffin/Cake Question - GMATPREP [#permalink] New post 20 May 2008, 17:04
when you subtract 20, i believe it should be subtracting 40... since the subtraction should be counted twice.
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Re: Muffin/Cake Question - GMATPREP [#permalink] New post 20 May 2008, 18:08
Easy. 3/10 using venn diagram
Re: Muffin/Cake Question - GMATPREP   [#permalink] 20 May 2008, 18:08
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