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## Official Guide Explanation:Problem Solving #69

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: 69
Page: 162
Difficulty: 5 (Moderate)
Category 1: Word Problems > Data Interpretation >
Category 2: Arithmetic > Descriptive Statistics > other

Explanation: First, list the approximate values of the bars on the graph. (I'm leaving off the thousands to simplify things.)

190, 170, 210, 260, 310, 340, 360, 350, 370, 350, 260

Now put them in ascending order:

170, 190, 210, 260, 260, 310, 340, 350, 350, 360, 370

Since there are 11 terms, the median is the term that is greater than 5 and less than 5. In this case, that's 310, choice (C).

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