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A certain manufacturer of cake, muffin, and bread mixes has [#permalink]
24 Apr 2006, 06:35

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Question Stats:

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100% (00:00) wrong based on 6 sessions

A certain manufacturer of cake, muffin, and bread mixes has 100 buyers, of whom 50 purchase 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 will be one who purchases neither cake mix nor muffin mix?

Hallo,
If 20 purchase both mixtures then 30 purchase cake mix only, 20 purchase muffin mix only. Then the number of people who buy neither is 30.
required prob is 30/100=3/10
IMO
regards