Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Jun 0308:30 AM PDT
-09:30 AM PDT
In Episode 7 of our GMAT Ninja CR series, we are rounding up the oddballs, the misfits, and the format-benders: EXCEPT, Fill-In-The-Blanks, and other unusual Critical Reasoning question types. When you see a question that ends with a literal blank line
May 2910:00 AM IST
-11:00 PM IST
Start your journey with a fully customized action plan and work with a dedicated mentor to achieve a 735+ score.- Jun 04
08:30 AM PDT
-09:30 AM PDT
For most test takers, Data Insights is the most challenging section on the GMAT, with test takers scoring several points lower on average on DI than on Quant or Verbal and completing the section with less time to spare. - Jun 10
06:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
09 Mar 2011, 04:29
Kudos
Bookmarks
can someone pls explain this concept..?
what do we mean by order does matter and order does not matter...??
for eg..) if we need to know the seating arrangement for 4 persons from 7 chairs,,,we take order matters and if we need to make a team of 4 people from 7 people in a room we take order not matters....??
or is there a better method to identify when order matters and when order does not matters...??
what do we mean by order does matter and order does not matter...??
for eg..) if we need to know the seating arrangement for 4 persons from 7 chairs,,,we take order matters and if we need to make a team of 4 people from 7 people in a room we take order not matters....??
or is there a better method to identify when order matters and when order does not matters...??
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
09 Mar 2011, 04:46
Kudos
Bookmarks
There is a group of 7 people and 4 chairs are available. You want to seat 4, then the order matters
First chair can be filled in 7 ways
Second chair can be filled in 6 ways
Third chair can be filled in 5 ways
Fourth chair can be filled in 4 ways
Total ways = 7 * 6 * 5 * 4
On the other hand, if you are making a team of 4 from a group of 7, order does not matters. Its 7C4
A = First person can be chosen in 7 ways
B = Second person - 6 ways
C = Third person - 5 ways
D = Fourth person - 4 ways
But ABCD = BCDA = CDAB = DABA ..... etc
So you have duplicates. There will be 4! duplicates per selection
To make unique teams, you will have to divide by 4!
Hence no of ways = 7 * 6 * 5 * 4 / (4!) = 7C4
First chair can be filled in 7 ways
Second chair can be filled in 6 ways
Third chair can be filled in 5 ways
Fourth chair can be filled in 4 ways
Total ways = 7 * 6 * 5 * 4
On the other hand, if you are making a team of 4 from a group of 7, order does not matters. Its 7C4
A = First person can be chosen in 7 ways
B = Second person - 6 ways
C = Third person - 5 ways
D = Fourth person - 4 ways
But ABCD = BCDA = CDAB = DABA ..... etc
So you have duplicates. There will be 4! duplicates per selection
To make unique teams, you will have to divide by 4!
Hence no of ways = 7 * 6 * 5 * 4 / (4!) = 7C4
punyadeep
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
