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.
24 Oct 2009, 04:28
Kudos
Bookmarks
Hi!
I'd like to know if there is a rule or formula for solving a question such as this one below:
"1/3 of the total participants were students, 3/4 of the total participants were female students. If 45 of the parcicipants were neither female nor students, what was the number of the total participants?"
I feel really overwhelmed whenever I see that kind of problems, because I don't recall studying these types of problems in school (or I may have just forgotton. It's been a while...)
I do feel certain that there must be a general set of rules or formula for solving this question type, because I don't think otherwise 2 minutes will do for manually trying to solve it out!
Any advice will be appreciated. Thanks guys!
I'd like to know if there is a rule or formula for solving a question such as this one below:
"1/3 of the total participants were students, 3/4 of the total participants were female students. If 45 of the parcicipants were neither female nor students, what was the number of the total participants?"
I feel really overwhelmed whenever I see that kind of problems, because I don't recall studying these types of problems in school (or I may have just forgotton. It's been a while...)
I do feel certain that there must be a general set of rules or formula for solving this question type, because I don't think otherwise 2 minutes will do for manually trying to solve it out!
Any advice will be appreciated. Thanks guys!
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!
27 Oct 2009, 13:14
Kudos
Bookmarks
Yes, there is a great method for these called a Double Set Matrix. You'll use it when your total is described by two qualities (here, student status and gender).
Draw a 3-by-3 grid. To the left, label from top to bottom: Women, Men, Total. Across the top, label left to right: Student, Not Student, Total. The key to setting it up correctly is to make sure the rows are mutually exclusive (Men = not Women, Not Student obviously means you can't be a Student).
Now you have a place to put any values given, and you can typically fill in other boxes with the knowledge that each row should total to the right, and each column should total to the bottom.
Try it and let me know how it works for you.
Draw a 3-by-3 grid. To the left, label from top to bottom: Women, Men, Total. Across the top, label left to right: Student, Not Student, Total. The key to setting it up correctly is to make sure the rows are mutually exclusive (Men = not Women, Not Student obviously means you can't be a Student).
Now you have a place to put any values given, and you can typically fill in other boxes with the knowledge that each row should total to the right, and each column should total to the bottom.
Try it and let me know how it works for you.
28 Oct 2009, 18:10
Kudos
Bookmarks
Hi!
Thanks for your post! It sounds similar to drawing a logical tablw that shows all the combination of each team. So the concept is familiar to me.
I was wondering, if there is actual mathematical (and "fool-proof") formula which I can apply for evaluating actual value in question that involves subgroups in a set. For example, if I see a question such as "1/3 of a total is female students and 2/3 of the total is female and 1/5 of the total is not a student. How many are neither student nor female?" (not a real question, so might not be a good description), is there any formula that I could apply (eg. sub group ratio x multiplied by subgroup ratio m equals to non-subgroup ratio l)
Thanks again!
Ps. I'm taking MGMAT course & private tutoring. MGMAT rocks
Thanks for your post! It sounds similar to drawing a logical tablw that shows all the combination of each team. So the concept is familiar to me.
I was wondering, if there is actual mathematical (and "fool-proof") formula which I can apply for evaluating actual value in question that involves subgroups in a set. For example, if I see a question such as "1/3 of a total is female students and 2/3 of the total is female and 1/5 of the total is not a student. How many are neither student nor female?" (not a real question, so might not be a good description), is there any formula that I could apply (eg. sub group ratio x multiplied by subgroup ratio m equals to non-subgroup ratio l)
Thanks again!
Ps. I'm taking MGMAT course & private tutoring. MGMAT rocks
