November 20, 2018 November 20, 2018 09:00 AM PST 10:00 AM PST The reward for signing up with the registration form and attending the chat is: 6 free examPAL quizzes to practice your new skills after the chat. November 20, 2018 November 20, 2018 06:00 PM EST 07:00 PM EST What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.
Author 
Message 
TAGS:

Hide Tags

Board of Directors
Joined: 01 Sep 2010
Posts: 3306

In a certain learning experiment, each participant had three trials an
[#permalink]
Show Tags
23 Jul 2017, 10:09
Question Stats:
74% (02:05) correct 26% (02:09) wrong based on 648 sessions
HideShow timer Statistics
In a certain learning experiment, each participant had three trials and was assigned, for each trial, a score of either 2, 1, 0, 1, or 2. The participant's final score consisted of the sum of the first trial score, 2 times the second trial score, and 3 times the third trial score. If Anne received scores of 1 and 1 for her first two trials, not necessarily in that order, which of the following could NOT be her final score? A. 4 B. 2 C. 1 D. 5 E. 6
Official Answer and Stats are available only to registered users. Register/ Login.
_________________
COLLECTION OF QUESTIONS AND RESOURCES Quant: 1. ALL GMATPrep questions Quant/Verbal 2. Bunuel Signature Collection  The Next Generation 3. Bunuel Signature Collection ALLINONE WITH SOLUTIONS 4. Veritas Prep Blog PDF Version 5. MGMAT Study Hall Thursdays with Ron Quant Videos Verbal:1. Verbal question bank and directories by Carcass 2. MGMAT Study Hall Thursdays with Ron Verbal Videos 3. Critical Reasoning_Oldy but goldy question banks 4. Sentence Correction_Oldy but goldy question banks 5. Readingcomprehension_Oldy but goldy question banks




Intern
Joined: 24 Feb 2017
Posts: 37

In a certain learning experiment, each participant had three trials an
[#permalink]
Show Tags
20 Aug 2017, 06:25
bfistein wrote: Took me 03:17 to solve, did it the same way as above. Seems like one of those questions that is just going to take a longish time to solve, albeit it is fairly simple. Not really. There's no need to calculate each individual sums. 2 possible scores for the first two trials 1,1. Let 3rd trial score = x. Total score can be 3x+1 or 3x1. Can never be a multiple of 3. So, 6 (or in that case even 6,3,0,3,6) can't come.




Manager
Joined: 23 May 2017
Posts: 242
Concentration: Finance, Accounting
WE: Programming (Energy and Utilities)

Re: In a certain learning experiment, each participant had three trials an
[#permalink]
Show Tags
23 Jul 2017, 10:35
Score in first trial = x Score in 2nd trial = y Score in 3rd trial = z allowed values for x , y and z are 2, 1, 0, 1, 2 final score = x + 2y + 3z given 2 scores are 1 and 1 so x = 1 or y = 1 or z = 1 and x = 1 or y = 1 or z = 1 sum can be ==> 1 + (2 * 1) + 3z ==> 3z  1 ==> equation 1 ==> 1 + 2y + ( 3* 1) ==> 2y  2 ==> equation 2 ==> 1 + (2 * 1) + 3z ==> 3z + 1 ===> equation 3 for z = 2 equation1 = 6  1= 7 and equation 3 = 6 + 1 = 5 for z = 1 equation1 = 3  1= 4 and equation 3 = 3 + 1 = 2 for z = 0 equation1 = 0  1 = 1 and equation 3 = 0 + 1 = 1 for z = 1 equation1 = 3  1 = 2 and equation 3 = 3 + 1 = 4 for z = 2 equation1 = 6  1 = 5 and equation 3 = 6 + 1 = 7 for y = 2 equation 2 = 2y  2 = 4  2 = 6 for y = 1 equation 2 = 2y  2 = 2  2 = 4 for y = 0 equation 2 = 2y  2 =  2 = 2 for y = 1 equation 2 = 2y  2 = 2  2 = 0 for y = 2 equation 2 = 2y  2 = 4  2 = 2 Among the answer choice all except 6 ( choice E ) can be the final score
_________________
If you like the post, please award me Kudos!! It motivates me



Senior SC Moderator
Joined: 22 May 2016
Posts: 2109

In a certain learning experiment, each participant had three trials an
[#permalink]
Show Tags
23 Jul 2017, 18:24
carcass wrote: In a certain learning experiment, each participant had three trials and was assigned, for each trial, a score of either 2, 1, 0, 1, or 2. The participant's final score consisted of the sum of the first trial score, 2 times the second trial score, and 3 times the third trial score. If Anne received scores of 1 and 1 for her first two trials, not necessarily in that order, which of the following could NOT be her final score?
A. 4
B. 2
C. 1
D. 5
E. 6 1. There are two cases for the total value of first two trials' scores of 1 and 1. Case 1 Trial 1 = 1. Trial 2 = 1, with weighted score of 2. 1 + 2 = 1Case 2 Trial 1 = 1. Trial 2 = 1, with weighted score of 2. 1 + (2) = 12. Add Trial 3 weighted score, 3C, to 1 or 1 Possible values, C, for Trial 3 are 2, 1, 0, 1, or 2 Which answer choice can we not achieve by addition or subtraction of 3C in combination with either 1 or 1? A. 4. Possible. C is 1, 3C is 3. 1  3 = 4. Reject B. 2. Possible. C is 1, 3C is 3. 1  3 = 2. Reject C. 1. Possible. C is 0, 3C is 0. 1 + 0 = 1. Reject D. 5. Possible. C is 2, 3C is 6. 1 + 6 = 5. Reject E. 6. Impossible by default. And there is no way to get +5 (to add to Case 1) or +7 (to add to Case 2) from 3 or a multiple of 3. Answer E



Senior PS Moderator
Joined: 26 Feb 2016
Posts: 3307
Location: India
GPA: 3.12

Re: In a certain learning experiment, each participant had three trials an
[#permalink]
Show Tags
23 Jul 2017, 19:14
There are 2 possibilities Case 1: Trial score 1(x) : 1, Trial score 2(y) : 1 (Sum = 1*1 + 2*1 = 1) Case 2: Trial score 1(x) : 1, Trial score 2(y) : 1 (Sum = 1*1 + 2*1 = 1) As for the third score, there are 5 possibilities each in case 1 and case 2 2,1,0,1,2 which has to multiplied by 3 and added to the previous sum(from both cases) The numbers which has to be added to attain the possible sums are 6,3,0,3,6. Possible sums in case 1 : 7,4,1,2,5 Possible sums in case 2 : 5,2,1,4,7 The only possible sum which is not part of this list is 6(Option E)
_________________
You've got what it takes, but it will take everything you've got



Intern
Joined: 11 Jul 2017
Posts: 2

Re: In a certain learning experiment, each participant had three trials an
[#permalink]
Show Tags
25 Jul 2017, 01:27
Took me 03:17 to solve, did it the same way as above. Seems like one of those questions that is just going to take a longish time to solve, albeit it is fairly simple.



Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 4170
Location: United States (CA)

Re: In a certain learning experiment, each participant had three trials an
[#permalink]
Show Tags
26 Jul 2017, 15:33
carcass wrote: In a certain learning experiment, each participant had three trials and was assigned, for each trial, a score of either 2, 1, 0, 1, or 2. The participant's final score consisted of the sum of the first trial score, 2 times the second trial score, and 3 times the third trial score. If Anne received scores of 1 and 1 for her first two trials, not necessarily in that order, which of the following could NOT be her final score?
A. 4
B. 2
C. 1
D. 5
E. 6 If Anne received 1 for her first trial and 1 for her second, then the sum of her first two trials is 1 + 2(1) = 1 + 2 = 1. If Anne received 1 for her first trial and 1 for her second, then the sum of her first two trials is 1 + 2(1) = 1 + 2 = 1. Let’s analyze each answer choice: A) 4 If the sum of the first two trials is 1 and the third trial is 1, then the sum can be 1 + 3(1) = 4. B) 2 If the sum of the first two trials is 1 and the third trial is 1, then the sum can be 1 + 3(1) = 2. C) 1 If the sum of the first two trials is 1 and the third trial is 0, then the sum can be 1 + 3(0) = 1. D) 5 If the sum of the first two trials is 1 and the third trial is 2, then the sum can be 1 + 3(2) = 5. E) 6 We see there is no way to get a sum of 6. Answer: E
_________________
Scott WoodburyStewart
Founder and CEO
GMAT Quant SelfStudy Course
500+ lessons 3000+ practice problems 800+ HD solutions



Manager
Joined: 21 Jun 2017
Posts: 84

Re: In a certain learning experiment, each participant had three trials an
[#permalink]
Show Tags
10 Sep 2017, 02:12
carcass wrote: In a certain learning experiment, each participant had three trials and was assigned, for each trial, a score of either 2, 1, 0, 1, or 2. The participant's final score consisted of the sum of the first trial score, 2 times the second trial score, and 3 times the third trial score. If Anne received scores of 1 and 1 for her first two trials, not necessarily in that order, which of the following could NOT be her final score?
A. 4
B. 2
C. 1
D. 5
E. 6 Final Score = (S1) + (S2 x 2) + (S3 x 3) given s1 and s2 = 1 or 1 1 + (2) + 6 = 5 so eliminate 5 1 + (2) + (3) = 4 so eliminate 4 1 + (2) + (3) = 2 1 + 2 = 0 = 1 eliminate 1 we are left with 6 Answer E



Manager
Joined: 01 Dec 2016
Posts: 111
Concentration: Finance, Entrepreneurship
WE: Investment Banking (Investment Banking)

Re: In a certain learning experiment, each participant had three trials an
[#permalink]
Show Tags
16 Oct 2017, 11:36
For this question, i believe the simplest way is to test the answer choices. From the stem, it flows that her score, before the last trial, will be 1 or 1. To get 4 as final score she must have 4 or 1. This is possible if she gets 1 in the last trial. Keep on testing, we see that the answer choices A through D work. But E does not work: to have 6 as final score, she must get a score of 5 or 7 in the last trial. both value are not multiple of 3.
_________________
What was previously considered impossible is now obvious reality. In the past, people used to open doors with their hands. Today, doors open "by magic" when people approach them



NonHuman User
Joined: 09 Sep 2013
Posts: 8817

Re: In a certain learning experiment, each participant had three trials an
[#permalink]
Show Tags
22 Oct 2018, 04:14
Hello from the GMAT Club BumpBot! Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up  doing my job. I think you may find it valuable (esp those replies with Kudos). Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Books  GMAT Club Tests  Best Prices on GMAT Courses  GMAT Mobile App  Math Resources  Verbal Resources




Re: In a certain learning experiment, each participant had three trials an &nbs
[#permalink]
22 Oct 2018, 04:14






