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mojorising800
Joined: 11 Dec 2009
Last visit: 05 Mar 2012
Posts: 111
Given Kudos: 7
Status:Its Wow or Never
Location: India
Concentration: Technology, Strategy
Schools: Tepper '14 Goizueta '14 ISB Tippie Kelley '14 Georgia Tech Mays Katz Kenan-Flagler '14 Schulich Smith '15
GMAT 1: 670 Q47 V35
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WE:Information Technology (Computer Software)
Schools: Tepper '14 Goizueta '14 ISB Tippie Kelley '14 Georgia Tech Mays Katz Kenan-Flagler '14 Schulich Smith '15
GMAT 2: 710 Q48 V40
Posts: 111
Updated on: 24 Jul 2016, 11:29
Originally posted by mojorising800 on 09 Jun 2010, 12:17.
Last edited by Bunuel on 24 Jul 2016, 11:29, edited 1 time in total.
Last edited by Bunuel on 24 Jul 2016, 11:29, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
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Question Stats:
59% (02:25) correct
41%
(02:39)
wrong
based on 39
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There are twenty students in a class, all of whom scored between 0 and 100 on their final exams. If the class average was 85, how many people scored below the average score on the exam?
(1) Twelve people in the class scored higher than an 85.
(2) The lowest eight scores added up to 640.
(1) Twelve people in the class scored higher than an 85.
(2) The lowest eight scores added up to 640.
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09 Jun 2010, 20:45
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The question can not be answered.
Using statement(1) -> you cant say anything about the number of people who scored below the average score on the exam.
Suppose 12 people get 86 marks each (which could be anything between 86 and 100 both inclusive), then there can be many scenarios:
1. Out of 8 people remaining, 7 people get 85 and 1 person gets 73.
2. 6 - 85 marks each, 2 - 158 marks(together)...similarly we can think of other combination.
Using statement(2) - Again many combination:
1. Lowest 8 scorers getting 80 each.
2. 7 people getting 85 marks each and last one getting 45 and so on.....
Using both the statement also we can not answer this question. Because both the statements say the same thing : lowest 8 scores sum to less than 680. First statement says highest 12 scores sum to more than 1020 and second one says lowest 8 scores sum to 640.So, even both the statements together are not sufficient to answer this question.
Using statement(1) -> you cant say anything about the number of people who scored below the average score on the exam.
Suppose 12 people get 86 marks each (which could be anything between 86 and 100 both inclusive), then there can be many scenarios:
1. Out of 8 people remaining, 7 people get 85 and 1 person gets 73.
2. 6 - 85 marks each, 2 - 158 marks(together)...similarly we can think of other combination.
Using statement(2) - Again many combination:
1. Lowest 8 scorers getting 80 each.
2. 7 people getting 85 marks each and last one getting 45 and so on.....
Using both the statement also we can not answer this question. Because both the statements say the same thing : lowest 8 scores sum to less than 680. First statement says highest 12 scores sum to more than 1020 and second one says lowest 8 scores sum to 640.So, even both the statements together are not sufficient to answer this question.
24 Jul 2016, 18:30
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Quick Solution:
Question - how many people have score < 85? Or How many people have score >=85?
Statement 1 - 12 people have score > 85, but its not answering what we are looking for. Insuff.
Statement 2 - Avg of lowest 8 people is 80, We can't say how many more will fall below 85. Insuff
Combined - Solution must be less than equal to 8, but we can't say surely because we would need proper distribution for same. Insuff
Question - how many people have score < 85? Or How many people have score >=85?
Statement 1 - 12 people have score > 85, but its not answering what we are looking for. Insuff.
Statement 2 - Avg of lowest 8 people is 80, We can't say how many more will fall below 85. Insuff
Combined - Solution must be less than equal to 8, but we can't say surely because we would need proper distribution for same. Insuff
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
