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Dan took a 20-question multiple-choice test in psychology. If Dan answ : Data Sufficiency (DS)
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Re: Dan took a 20-question multiple-choice test in psychology. If Dan answ [#permalink]
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Bunuel wrote:

Tough and Tricky questions: Word Problems.



Dan took a 20-question multiple-choice test in psychology. If Dan answered every question, did he answer at least 12 questions correctly?

(1) Dan answered fewer than 40 percent of the questions incorrectly.
(2) Dan answered at least 25 percent of the questions incorrectly.


Kudos for a correct solution.



1. less than 40% incorrect so more than 60% correct answers - This is sufficient to say that Dan answered more than 12 questions correctly - Sufficient
2. Atleast 25% incorrectly - It could be 100% incorrect or 25% incorrect - Not sufficient to get the required answer

Ans A
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Re: Dan took a 20-question multiple-choice test in psychology. If Dan answ [#permalink]
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Re: Dan took a 20-question multiple-choice test in psychology. If Dan answ [#permalink]
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