Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 27 Jun 2016, 00:38

### 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 June
Open Detailed Calendar

# ps - silly married couples who wont sit next to each other

Author Message
Manager
Joined: 11 Jul 2004
Posts: 119
Followers: 1

Kudos [?]: 12 [0], given: 0

ps - silly married couples who wont sit next to each other [#permalink]

### Show Tags

20 Aug 2004, 13:38
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Two couples and one single person are seated at random in a row of five chairs. What is the probability that neither of the couples sits together in adjacent chairs?

a. 1/5
b. 1/4
c. 3/8
d. 2/5
e. 1/2

on a pratice test I spent 5 mins on this. Not good. Hopefully someone can solve in less time

thanks
CEO
Joined: 15 Aug 2003
Posts: 3461
Followers: 67

Kudos [?]: 804 [0], given: 781

### Show Tags

20 Aug 2004, 14:03
This problem was discussed earlier. of course, other explanations are welcome.

This is one of the discussions. i am sure you will find more if you run a search.

http://www.gmatclub.com/phpbb/viewtopic.php?t=2559
Joined: 31 Dec 1969
Location: India
Concentration: Marketing, General Management
GMAT 1: 710 Q49 V0
GMAT 2: 700 Q V
GMAT 3: 740 Q40 V50
GMAT 4: 700 Q48 V38
GMAT 5: 710 Q45 V41
GMAT 6: 680 Q47 V36
GMAT 7: Q42 V44
GMAT 8: Q42 V44
GMAT 9: 740 Q49 V42
GMAT 10: 740 Q V
GMAT 11: 500 Q47 V33
GPA: 3.3
WE: Sales (Investment Banking)
Followers: 0

Kudos [?]: 151 [0], given: 97676

### Show Tags

18 Sep 2004, 12:05
There are 6 ways in which both couples are sitting together (3! ways)
There are 12 ways in which 1 couple is sitting togther and other separate
So, there are 18 ways that atleast 1 couple is sitting together.

Prob of neither = 1 - either or both = 1 - 18/30 = 12/30 = 2/5.
Display posts from previous: Sort by