GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 12 Dec 2018, 04:57

### GMAT 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

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

## Events & Promotions

###### Events & Promotions in December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
• ### The winning strategy for 700+ on the GMAT

December 13, 2018

December 13, 2018

08:00 AM PST

09:00 AM PST

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.
• ### GMATbuster's Weekly GMAT Quant Quiz, Tomorrow, Saturday at 9 AM PST

December 14, 2018

December 14, 2018

09:00 AM PST

10:00 AM PST

10 Questions will be posted on the forum and we will post a reply in this Topic with a link to each question. There are prizes for the winners.

# For a class photo, a group of students forms a single line from left

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 51121
For a class photo, a group of students forms a single line from left  [#permalink]

### Show Tags

30 Jun 2018, 22:51
00:00

Difficulty:

45% (medium)

Question Stats:

60% (01:20) correct 40% (01:09) wrong based on 132 sessions

### HideShow timer Statistics

For a class photo, a group of students forms a single line from left to right. If Robert, who is the 15th student from the left, is immediately to the right of Christine, who is the 13th student from the right, how many total students are in the line?

A. 26
B. 27
C. 28
D. 29
E. 30

_________________
Intern
Joined: 26 Mar 2015
Posts: 10
Re: For a class photo, a group of students forms a single line from left  [#permalink]

### Show Tags

30 Jun 2018, 23:09
counting from left 13 (upto chritine ) + Christine + Robert + 11
total 26 IMO
Manager
Joined: 11 Mar 2018
Posts: 90
Re: For a class photo, a group of students forms a single line from left  [#permalink]

### Show Tags

01 Jul 2018, 00:18
Bunuel wrote:
For a class photo, a group of students forms a single line from left to right. If Robert, who is the 15th student from the left, is immediately to the right of Christine, who is the 13th student from the right, how many total students are in the line?

A. 26
B. 27
C. 28
D. 29
E. 30

IMO 26

Robert = 15th Student, who is immediately to the right of Christine making her the 14th student.

Now Christine is 13th from the right making Robert 12th from the right.

This means that after Robert 11 more students are present.

Hence 15 + 11 = 26
_________________

Regards
---------------------------------
A Kudos is one more question and its answer understood by somebody !!!

Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 4278
Location: United States (CA)
Re: For a class photo, a group of students forms a single line from left  [#permalink]

### Show Tags

04 Jul 2018, 18:08
1
Bunuel wrote:
For a class photo, a group of students forms a single line from left to right. If Robert, who is the 15th student from the left, is immediately to the right of Christine, who is the 13th student from the right, how many total students are in the line?

A. 26
B. 27
C. 28
D. 29
E. 30

To get the correct approach, we assume we are facing the group of students in line. Therefore, the terms “left” and “right” are from our perspective.

Let’s first work from the left. Since Robert is the 15th student from the left and Christine is immediately to the left of Robert, there must be 13 students to the left of Christine (so that Christine is 14th and Robert is 15th in line from the left).

Now let’s work from the right. Since Christine is the 13th student from the right and Robert is immediately to the right of Christine, there must be 11 students to the right of Robert (so that Robert is the 12th and Christine is the 13th from the right). To recap, we have, from left to right:

13 students, Christine, Robert, 11 students

Therefore, there must be 13 + 1 + 1 + 11 = 26 students in the line for the class photo.

_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Re: For a class photo, a group of students forms a single line from left &nbs [#permalink] 04 Jul 2018, 18:08
Display posts from previous: Sort by