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# Muffin/Cake Question - GMATPREP

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Senior Manager
Joined: 01 Feb 2005
Posts: 271

Kudos [?]: 109 [0], given: 1

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02 Jun 2006, 11:19
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Thanks
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Kudos [?]: 109 [0], given: 1

VP
Joined: 29 Dec 2005
Posts: 1338

Kudos [?]: 69 [0], given: 0

Re: Muffin/Cake Question - GMATPREP [#permalink]

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02 Jun 2006, 12:11
axl_oz wrote:
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

Kudos [?]: 69 [0], given: 0

Manager
Joined: 29 Apr 2006
Posts: 85

Kudos [?]: 29 [0], given: 0

Re: Muffin/Cake Question - GMATPREP [#permalink]

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02 Jun 2006, 17:26
Professor wrote:
axl_oz wrote:
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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Intern
Joined: 29 Apr 2006
Posts: 14

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02 Jun 2006, 18:01
My Answer is 3/10. I used Venn diagram.

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Director
Joined: 10 Oct 2005
Posts: 524

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Location: US

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02 Jun 2006, 23:48
yeah use Venn diagram...

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

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Manager
Joined: 15 Nov 2007
Posts: 135

Kudos [?]: 56 [0], given: 2

Re: Muffin/Cake Question - GMATPREP [#permalink]

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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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Manager
Joined: 01 May 2008
Posts: 111

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Location: São Paulo
Re: Muffin/Cake Question - GMATPREP [#permalink]

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20 May 2008, 18:08
Easy. 3/10 using venn diagram

Kudos [?]: 7 [0], given: 0

Re: Muffin/Cake Question - GMATPREP   [#permalink] 20 May 2008, 18:08
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