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What percent of a group of people are women with red hair?

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What percent of a group of people are women with red hair? [#permalink] New post 23 Jul 2012, 04:45
00:00

Question Stats:

79% (01:32) correct 20% (00:12) wrong based on 12 sessions
The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions Project

What percent of a group of people are women with red hair?

(1) Of the women in the group, 5 percent have red hair.
(2) Of the men in the group, 10 percent have red hair.

Practice Questions
Question: 2
Page: 275
Difficulty: 550


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Re: What percent of a group of people are women with red hair? [#permalink] New post 23 Jul 2012, 04:45
SOLUTION

What percent of a group of people are women with red hair?

(1) Of the women in the group, 5 percent have red hair.
(2) Of the men in the group, 10 percent have red hair.

Even taken together the statements are not sufficient to answer the question, since we don't know what percent of the group are women.

Answer: E.
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DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set. NEW!!!


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Re: What percent of a group of people are women with red hair? [#permalink] New post 25 Jul 2012, 02:34
Let women be x and men be y;

Then based on the first condition; 0.05x of the women are red-haired, thus % of red haired women as a group = .05x/x+y => Not Sufficient

Second Condition: 0.1y = number of red-haired men; thus, not sufficient

Combining, not extra information.. still we cannot derive the percentage of red-haired women as the group.

Thus, E
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Re: What percent of a group of people are women with red hair? [#permalink] New post 27 Jul 2012, 07:45
SOLUTION

What percent of a group of people are women with red hair?

(1) Of the women in the group, 5 percent have red hair.
(2) Of the men in the group, 10 percent have red hair.

Even taken together the statements are not sufficient to answer the question, since we don't know what percent of the group are women.

Answer: E.
_________________

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. NEW!!!

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set. NEW!!!


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Re: What percent of a group of people are women with red hair? [#permalink] New post 29 Apr 2013, 14:02
I thought are was enough becuase it said what percentage of a group of people are women with red hair.

the statment one says 5% of the women in the group have red hair
Re: What percent of a group of people are women with red hair?   [#permalink] 29 Apr 2013, 14:02
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