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## Official Guide Explanation:Data Sufficiency #146

Background

This is just one of hundreds of free explanations I've created to the quantitative questions in The Official Guide for GMAT Review (12th ed.). Click the links on the question number, difficulty level, and categories to find explanations for other problems.

These are the same explanations that are featured in my "Guides to the Official Guide" PDF booklets. However, because of the limitations of HTML and cross-browser compatibility, some mathematical concepts, such as fractions and roots, do not display as clearly online.

Question: 146
Page: 286
Difficulty: 5 (Moderate)
Category 1: Algebra > Inequalities > other
Category 2: Word Problems > Rate Problems > other

Explanation: 120 words per paragraph for 25 paragraphs is a total of 120(25) = 3,000 words. The non - preface part of the report is 2,600 words long, so the question is asking whether the number of words in the preface is less than 400.

Statement (1) is insufficient: if the preface has more than 200 words, it could be less than 400, but could also be greater. Statement (2) is sufficient: if the preface has less than 300 words, it must have less than 400. The correct choice is (B).

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