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A report consisting of 2,600 words is divided into 23 paragr

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A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 18 Dec 2012, 07:01
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69% (02:25) correct 31% (01:42) wrong based on 197 sessions
A report consisting of 2,600 words is divided into 23 paragraphs. A 2-paragraph preface is then added to the report. Is the average (arithmetic mean) number of words per paragraph for all 25 paragraphs less than 120 ?

(1) Each paragraph of the preface has more than 100 words.
(2) Each paragraph of the preface has fewer than 150 words.
[Reveal] Spoiler: OA
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Re: A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 18 Dec 2012, 07:06
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A report consisting of 2,600 words is divided into 23 paragraphs. A 2-paragraph preface is then added to the report. Is the average (arithmetic mean) number of words per paragraph for all 25 paragraphs less than 120 ?

The question asks whether the average number of words per paragraph for all 25 paragraphs is less than 120, or whether the total number of words for all 25 paragraphs is less than 25*120=3,000. Thus, the question basically asks whether the total number of words for 2-paragraph preface is less than 3,000-2,600=400.

(1) Each paragraph of the preface has more than 100 words. This implies that the total number of words for 2-paragraph preface is more than 200. Not sufficient.

(2) Each paragraph of the preface has fewer than 150 words. This implies that the total number of words for 2-paragraph preface is less than 300. Sufficient.

Answer: B.
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Re: A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 20 Aug 2013, 01:34
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Re: A report consisting of 2,600 words is divided into 23 paragr   [#permalink] 20 Aug 2013, 01:34
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A report consisting of 2,600 words is divided into 23 paragr

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