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GMAT Prep Overlapping Sets problem [#permalink]
20 May 2011, 09:47

00:00

A

B

C

D

E

Difficulty:

25% (medium)

Question Stats:

88% (01:44) correct
12% (01:24) wrong based on 25 sessions

I am interested to seeing the different approaches to solving this problem:

A certain manufacturer of cake, muffin, and bread mixes has 100 buyers, of whom 50 purchases cake mix, 40 purchase muffin mix, and 20 purchase both cake mix and muffin mix. If a buyer is to be selected at random from the 100 buyers, what is the probability that the buyer selected will be one who purchases neither cake mix nor muffin mix?

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