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.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
bowhag
Current Student
Joined: 28 Mar 2020
Last visit: 07 Mar 2022
Posts: 5
Own Kudos:
Given Kudos: 4
Location: Netherlands
Concentration: Marketing, Entrepreneurship
Schools: Georgetown MiM "23 (A$)
GPA: 3.93
15 Jun 2020, 07:59
Kudos
Bookmarks
In the official guide they only go about explaining the premutations with repetition (n!) and Combinations without repetition (n! : k!(n-k)!.
Does this mean the other two (nPr & (k+n-1)! : k! (n-r)! ) are not used in the general questions and you don't need to know them?
Thanks in advance,
Bow
Does this mean the other two (nPr & (k+n-1)! : k! (n-r)! ) are not used in the general questions and you don't need to know them?
Thanks in advance,
Bow
15 Jun 2020, 14:36
Kudos
Bookmarks
Hi bowhag,
You're going to find that most GMAT questions are written so that they can be approached in more than one way. When dealing with any individual question, you have two goals: correctly answer the question, if possible (in a reasonable amount of time) and work in an efficient fashion. Thus, just because you correctly answer a question does not necessarily mean that there isn't something to be learned (such as a faster, more efficient approach).
Permutations and Combinations are relatively rare subjects on the GMAT - and sometimes you can approach them without using any formulas at all (although with certain Combination Formula questions, knowing the Combination Formula makes answering the question a LOT easier).
Since you're asking about some of the tougher concepts in the Quant section, how are you currently performing on all of the larger point-categories right now? How have you scored on your practice CATs/mocks? What is your overall goal score?
GMAT assassins aren't born, they're made,
Rich
You're going to find that most GMAT questions are written so that they can be approached in more than one way. When dealing with any individual question, you have two goals: correctly answer the question, if possible (in a reasonable amount of time) and work in an efficient fashion. Thus, just because you correctly answer a question does not necessarily mean that there isn't something to be learned (such as a faster, more efficient approach).
Permutations and Combinations are relatively rare subjects on the GMAT - and sometimes you can approach them without using any formulas at all (although with certain Combination Formula questions, knowing the Combination Formula makes answering the question a LOT easier).
Since you're asking about some of the tougher concepts in the Quant section, how are you currently performing on all of the larger point-categories right now? How have you scored on your practice CATs/mocks? What is your overall goal score?
GMAT assassins aren't born, they're made,
Rich
bowhag
Current Student
Joined: 28 Mar 2020
Last visit: 07 Mar 2022
Posts: 5
Own Kudos:
Given Kudos: 4
Location: Netherlands
Concentration: Marketing, Entrepreneurship
Schools: Georgetown MiM "23 (A$)
GPA: 3.93
15 Jun 2020, 23:34
Kudos
Bookmarks
Thanks for the response!
I did one mock a while ago and I didn't score very high on Quant, but honestly, I haven't done simple equations etc. for years now and never really learned it properly in secondary school (I wasn't the most active student back in the day if you get what I mean haha), so I'm revising the whole quant explanation at the moment.
even further so I can't remember if I even had these permutations and combination formulas at all in secondary school.
But again thank you for the answer! I also didn't think I really need a formula for it in general but since I'm learning everything again I want to learn it the proper way. So I think I just look at all of them but go into the ones mentioned in the official guide a bit deeper, but even if it doesn't appear on the GMAT, it's still good to learn.
I did one mock a while ago and I didn't score very high on Quant, but honestly, I haven't done simple equations etc. for years now and never really learned it properly in secondary school (I wasn't the most active student back in the day if you get what I mean haha), so I'm revising the whole quant explanation at the moment.
even further so I can't remember if I even had these permutations and combination formulas at all in secondary school.
But again thank you for the answer! I also didn't think I really need a formula for it in general but since I'm learning everything again I want to learn it the proper way. So I think I just look at all of them but go into the ones mentioned in the official guide a bit deeper, but even if it doesn't appear on the GMAT, it's still good to learn.
