[phpBB Debug] PHP Notice: in file /viewtopic.php on line 1525: Undefined array key "topic_tags_visibility"
[phpBB Debug] PHP Notice: in file /viewtopic.php on line 1526: Undefined array key "timer_statistics_visibility"
There are 5 chairs. Bob and Rachel want to sit such that Bob is always : Numeric Entry Question

Last visit was: 22 Jul 2024, 16:06 It is currently 22 Jul 2024, 16:06

Close

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

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

Track
Your Progress

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

Practice
Pays

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
Senior Manager
Senior Manager
Joined: 17 Aug 2019
Posts: 381
Own Kudos [?]: 181 [2]
Given Kudos: 96
Send PM
Most Helpful Community Reply
avatar
Manager
Manager
Joined: 27 Nov 2019
Posts: 78
Own Kudos [?]: 191 [5]
Given Kudos: 0
Send PM
General Discussion
avatar
Intern
Intern
Joined: 23 May 2020
Posts: 14
Own Kudos [?]: 15 [3]
Given Kudos: 0
Send PM
avatar
Intern
Intern
Joined: 11 Jun 2020
Posts: 1
Own Kudos [?]: 0 [0]
Given Kudos: 0
Send PM
Re: There are 5 chairs. Bob and Rachel want to sit such that Bob is always [#permalink]
4!(1!)
=24

Posted from my mobile device Image
Senior Manager
Senior Manager
Joined: 03 Dec 2020
Posts: 440
Own Kudos [?]: 60 [0]
Given Kudos: 68
Send PM
Re: There are 5 chairs. Bob and Rachel want to sit such that Bob is always [#permalink]
correct answer is....
Intern
Intern
Joined: 15 Jun 2021
Posts: 23
Own Kudos [?]: 16 [1]
Given Kudos: 23
Send PM
Re: There are 5 chairs. Bob and Rachel want to sit such that Bob is always [#permalink]
1
Hello,

What's the actual answer to this type of question.

I get 24.

Why is the law of symmetry producing another answer

Posted from my mobile device
Verbal Expert
Joined: 18 Apr 2015
Posts: 29147
Own Kudos [?]: 34186 [0]
Given Kudos: 25534
Send PM
Re: There are 5 chairs. Bob and Rachel want to sit such that Bob is always [#permalink]
Expert Reply
Let the chairs from left to right be :
A B C D E

If:
(i) Rachel is at A, possible arrangements = 0
(ii) Rachel is at B, possible arrangements = 1
(iii) Rachel is at C, possible arrangements = 2
(iv) Rachel is at D, possible arrangements = 3
(v) Rachel is at E, possible arrangements = 4

Total = 1+2+3+4 = 10
Intern
Intern
Joined: 15 Jun 2021
Posts: 23
Own Kudos [?]: 16 [0]
Given Kudos: 23
Send PM
Re: There are 5 chairs. Bob and Rachel want to sit such that Bob is always [#permalink]
Carcass wrote:
Let the chairs from left to right be :
A B C D E

If:
(i) Rachel is at A, possible arrangements = 0
(ii) Rachel is at B, possible arrangements = 1
(iii) Rachel is at C, possible arrangements = 2
(iv) Rachel is at D, possible arrangements = 3
(v) Rachel is at E, possible arrangements = 4

Total = 1+2+3+4 = 10



I see the difference now. So Left of Rachel don't necessarily mean JUST BEFORE Rachel.

Posted from my mobile device
avatar
Intern
Intern
Joined: 26 Nov 2023
Posts: 9
Own Kudos [?]: 9 [0]
Given Kudos: 15
Send PM
Re: There are 5 chairs. Bob and Rachel want to sit such that Bob is always [#permalink]
Carcass wrote:
Let the chairs from left to right be :
A B C D E

If:
(i) Rachel is at A, possible arrangements = 0
(ii) Rachel is at B, possible arrangements = 1
(iii) Rachel is at C, possible arrangements = 2
(iv) Rachel is at D, possible arrangements = 3
(v) Rachel is at E, possible arrangements = 4

Total = 1+2+3+4 = 10

This assumes that the all chairs are similar to each other. If all chairs weren't the same, then the answer would be 4!
Prep Club for GRE Bot
Re: There are 5 chairs. Bob and Rachel want to sit such that Bob is always [#permalink]
Moderators:
GRE Instructor
52 posts
GRE Forum Moderator
29 posts
Moderator
1093 posts
GRE Instructor
218 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne