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.
May 2808:30 AM PDT
-09:30 AM PDT
Are you constantly rereading GMAT RC passages but still struggling to understand them? Most students think rereading improves accuracy — but in reality, it usually signals a flawed reading strategy.
May 2110:00 AM EDT
-11:59 PM EDT
Make the most of your break with the most realistic GMAT™ prep. Take up to $700 off select products.- May 27
08:30 AM PDT
-09:30 AM PDT
Next - GMAT Ninja CR series, we tackle a very specific flavor of Critical Reasoning: Plans & Goals questions. The GMAT loves to present a scenario where a company, government, or individual proposes a seemingly brilliant plan to achieve a specific goal. - 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..
06 Jan 2005, 10:57
Kudos
Bookmarks
29.If a code is made of different letters selected from ABCDEFGHIJ, what is the ratio of the number of five-letter code to the number of four-letter code?
will it be 10C5/10C4 ?
OA is 6:1
will it be 10C5/10C4 ?
OA is 6:1
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!
06 Jan 2005, 11:04
Kudos
Bookmarks
Here, you need to use permutation as order matters (each order gives a unique code).
5 digit code - 10 P5 = 10x9x8x7x6
4 digit code - 10 P4 = 10x9x8x7
So, the ratio is 6:1
5 digit code - 10 P5 = 10x9x8x7x6
4 digit code - 10 P4 = 10x9x8x7
So, the ratio is 6:1
06 Jan 2005, 11:20
Kudos
Bookmarks
I agree you not only select but also arrange. Hence use a P.
10P5:10P4
Eg:
Indian cricket team goes to Pak for one day series...
16 members go...
so you select 11 players first, which can be done in 16C11 ways...
ok this is only selection....
now if you also want to decide their batting order then total number of ways in which you can select 11 players out of 16 and arrange them is
16P11.
10P5:10P4
Eg:
Indian cricket team goes to Pak for one day series...
16 members go...
so you select 11 players first, which can be done in 16C11 ways...
ok this is only selection....
now if you also want to decide their batting order then total number of ways in which you can select 11 players out of 16 and arrange them is
16P11.
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!
