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

 It is currently 18 Mar 2019, 13:14

### 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
Your Progress

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

# Eight dogs are in a pen when a sled owner comes to choose two dogs to

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 53657
Eight dogs are in a pen when a sled owner comes to choose two dogs to  [#permalink]

### Show Tags

20 Dec 2016, 08:00
2
3
00:00

Difficulty:

5% (low)

Question Stats:

82% (01:05) correct 18% (00:58) wrong based on 162 sessions

### HideShow timer Statistics

Eight dogs are in a pen when a sled owner comes to choose two dogs to form a sled team. If the dogs are to be placed in a straight line and different orderings of the same dogs are considered the same team, how many different sled teams can the owner form?

A. 72
B. 56
C. 42
D. 30
E. 28

_________________
Senior PS Moderator
Joined: 26 Feb 2016
Posts: 3358
Location: India
GPA: 3.12
Re: Eight dogs are in a pen when a sled owner comes to choose two dogs to  [#permalink]

### Show Tags

07 Jan 2018, 10:29
Bunuel wrote:
Eight dogs are in a pen when a sled owner comes to choose two dogs to form a sled team. If the dogs are to be placed in a straight line and different orderings of the same dogs are considered the same team, how many different sled teams can the owner form?

A. 72
B. 56
C. 42
D. 30
E. 28

Since there are eight dogs in a pen and we need to choose 2 of these dogs to form a sled team,

there are $$C^2_8 = \frac{8!}{6!*2!} = \frac{8*7}{2} = 28$$ ways to choose the teams(Option E)
_________________

You've got what it takes, but it will take everything you've got

Intern
Joined: 15 Nov 2017
Posts: 42
Re: Eight dogs are in a pen when a sled owner comes to choose two dogs to  [#permalink]

### Show Tags

09 Dec 2018, 16:03
Hi Bunuel,

Is there a way to tell when a problem is going to be a C vs. a P? For instance, it seems in this problem that the words "different ordering" lead to the conclusion of C; however, sometimes I have trouble confidently determining this.

Your insight would be great. Thanks!

Bunuel wrote:
Eight dogs are in a pen when a sled owner comes to choose two dogs to form a sled team. If the dogs are to be placed in a straight line and different orderings of the same dogs are considered the same team, how many different sled teams can the owner form?

A. 72
B. 56
C. 42
D. 30
E. 28
Senior Manager
Joined: 17 Mar 2014
Posts: 434
Re: Eight dogs are in a pen when a sled owner comes to choose two dogs to  [#permalink]

### Show Tags

08 Jan 2019, 20:25
KHow wrote:
Hi Bunuel,

Is there a way to tell when a problem is going to be a C vs. a P? For instance, it seems in this problem that the words "different ordering" lead to the conclusion of C; however, sometimes I have trouble confidently determining this.

Your insight would be great. Thanks!

Bunuel wrote:
Eight dogs are in a pen when a sled owner comes to choose two dogs to form a sled team. If the dogs are to be placed in a straight line and different orderings of the same dogs are considered the same team, how many different sled teams can the owner form?

A. 72
B. 56
C. 42
D. 30
E. 28

KHow
whenever ordering matters it is P and if ordering doesn't matter then it is C.

for example, in this question, it is explicitly mentioned that "different orderings of the same dogs are considered the same team" it means ordering doesn't matter.

Tom - Jerry
Jerry-Tom

Both are same team as per above question so it is C.
Re: Eight dogs are in a pen when a sled owner comes to choose two dogs to   [#permalink] 08 Jan 2019, 20:25
Display posts from previous: Sort by

# Eight dogs are in a pen when a sled owner comes to choose two dogs to

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.