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.
For which of the following values of x is the mode of 2x, x
[#permalink]
24 Nov 2017, 20:41
24 Nov 2017, 20:41
Expert Reply
00:00
Question Stats:
89% (01:05) correct
10% (01:15) wrong based on 19 sessions
Hide Show timer Statistics
For which of the following values of x is the mode of 2x, x + 5, 3x − 2, 5x − 7, and 4x equal to 4 ?
A. 2
B. 3
C. 4
D. 5
E. 7
A. 2
B. 3
C. 4
D. 5
E. 7
Drill 1
Question: 7
Page: 522
Question: 7
Page: 522
Re: For which of the following values of x is the mode of 2x, x
[#permalink]
02 Dec 2017, 10:48
02 Dec 2017, 10:48
2
sandy wrote:
For which of the following values of x is the mode of 2x, x + 5, 3x − 2, 5x − 7, and 4x equal to 4 ?
A. 2
B. 3
C. 4
D. 5
E. 7
A. 2
B. 3
C. 4
D. 5
E. 7
Drill 1
Question: 7
Page: 522
Question: 7
Page: 522
Mode means in a set of data values the value that appears most often
Now for the set 2x, x + 5, 3x − 2, 5x − 7, and 4x
Consider x= 2 , we have
4 , 9, 4, 3, 8
Consider x= 3 , we have
6, 8, 7, 8, 12
Consider x= 4 , we have
8, 9, 10, 13, 16
Consider x= 5 , we have
10, 10, 13, 22, 20
Consider x= 7 , we have
14, 12, 19, 28, 28
Thus mode is 4; when x= 2.
Re: For which of the following values of x is the mode of 2x, x
[#permalink]
10 Dec 2017, 13:14
10 Dec 2017, 13:14
1
Expert Reply
Explanation
Remember that mode means the number that appears “most often.” Plug In the Answers. For choice (C), if x = 4, then the numbers become: 8, 9, 10, 13, 16.
For a list of numbers to have a mode, there has to be at least two of one of the numbers. So this list has no mode; eliminate choice (C). For choice (A), if x = 2, then the numbers become: 4, 7, 4, 3, 8.
Because 4 appears twice, 4 is the mode—the answer is choice A.
Remember that mode means the number that appears “most often.” Plug In the Answers. For choice (C), if x = 4, then the numbers become: 8, 9, 10, 13, 16.
For a list of numbers to have a mode, there has to be at least two of one of the numbers. So this list has no mode; eliminate choice (C). For choice (A), if x = 2, then the numbers become: 4, 7, 4, 3, 8.
Because 4 appears twice, 4 is the mode—the answer is choice A.
