### Bookshelf

Total GMAT MathJeff's complete Quant guide, on sale now! |

Total GMAT VerbalEverything you need to ace GMAT Verbal! |

New: GMAT 111Improve every aspect of your GMAT prep! |

**1,800 Practice Math Questions**

GMAT Official Guide

OG Math | OG Verbal

Guides To the Official Guide

Free: OG12 explanations!

**GMAT Question of the Day**

Beginner's Guide to the GMAT

GMAT Hacks Affiliate Program

### Categories

- General Study Tips
- Goals and Planning
- CAT Strategy
- The Mental Game
- GMAT Math Strategy
- GMAT Math Topics
- Mental Math
- Data Sufficiency
- Critical Reasoning
- Reading Comprehension
- Sentence Correction
- Analytical Writing Assessment
- Business School Admissions
- GMAT Prep Resources
- Practice Questions
- Total GMAT Math
- Total GMAT Verbal

## Official Guide Explanation:

Data Sufficiency #32

**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.

Click here for an example of the PDF booklets. Click here to purchase a PDF copy.

**Solution and Metadata**

**Question****: 32**

Page: 275

Difficulty: **4** (Moderately Easy)

Category 1: Word Problems > Other >

Category 2: Arithmetic > Descriptive Statistics > Average

**Explanation:** We don't need to worry specifically about the 7 percent sales tax. The more important question is the total cost of the items subject to the tax--that is, the total cost of the items that cost more than $100 each.

Statement (1) is insufficient. Since the coat cost $125, that leaves $240 for the other six items. It's possible that the other six items were all less than $100 each; for instance, each of the items could be $40 each. However, one of the items could be $140 and the other five could be $20 each.

Statement (2) is also insufficient. If the average of the other six items is $40, those items total $240, meaning that the coat cost $125. That's the same information that (1) gave us, so the result must be the same, as well.

Taken together, the statements are still insufficient. They tell us the same thing, so combining them does not give us any information we didn't have looking at either statement indepedently. Choice (E) is correct.

Click here for the full list of GMAT OG12 explanations.

You should follow me on Twitter. While you're at it, take a moment to
subscribe to
GMAT Hacks via RSS or Email. |

Total GMAT Math
The comprehensive guide to the GMAT Quant section. It's "far and away the best study material
available," including over 300 realistic practice questions and more than 500 exercises! |