GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
50% of the students on a class
[#permalink]
10 Mar 2021, 04:56
10 Mar 2021, 04:56
Expert Reply
3
Bookmarks
00:00
Question Stats:
84% (01:12) correct
15% (01:04) wrong based on 76 sessions
Hide Show timer Statistics
50% of the students in a class are male, and 40% of the student in the class have brown hair
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
Quantity A |
Quantity B |
The percentage of the students in the class who are boys with brown hair |
20% |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
Retired Moderator
Joined: 16 Apr 2020
Status:Founder & Quant Trainer
Affiliations: Prepster Education
Posts: 1546
Given Kudos: 172
Location: India
WE:Education (Education)
Re: 50% of the students on a class
[#permalink]
10 Mar 2021, 05:02
10 Mar 2021, 05:02
Carcass wrote:
50% of the students in a class are male, and 40% of the student in the class have brown hair
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
The percentage of the students in the class who are boys with brown hair |
20% |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Let the total number of students be \(100\)
Number of Males = \(50\)
Number of Females = \(50\)
Number of students with brown hair = \(40\)
Case I: All \(40\) are females
Col. A: \(0\)
Col. B: \(20\)
i.e. Col. A < Col. B
Case II: All \(40\) are Males
Col. A: \(40\)
Col. B: 20
i.e. Col. A > Col. B
Hence, option D
Manager
Joined: 27 Jun 2021
Posts: 69
Given Kudos: 111
GRE 1: Q154 V167
GPA: 3.71
50% of the students on a class
[#permalink]
22 Jul 2021, 19:49
22 Jul 2021, 19:49
1
Let's consider some examples:
1. 50% of the students are men. If 40% of all students have brown hair, it means that all the students with brown hair could reside outside the "male" category (i.e., in the other 50%).
2. If, on the other hand, only male students have brown hair, that 40% would reside entirely within the 50% of male students.
Hence, we can produce two very different scenarios that would both be valid given the information we have at hand.
Hence, D!
1. 50% of the students are men. If 40% of all students have brown hair, it means that all the students with brown hair could reside outside the "male" category (i.e., in the other 50%).
2. If, on the other hand, only male students have brown hair, that 40% would reside entirely within the 50% of male students.
Hence, we can produce two very different scenarios that would both be valid given the information we have at hand.
Hence, D!
