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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies, Tackle difficult RC & MSR with confidence, and Excel in timed test environment
Join us in a comprehensive talk about the F1 Student Visa process with Travis Feuerbacher, former U.S. Visa Officer and licensed U.S. immigration attorney having expertise working for the U.S. Department of State
Ready to skyrocket your career with an MBA? Get ahead with our curated list of FREE courses and resources to kickstart your journey into business education!
Are you attending an MBA or Masters program outside in the US or Europe and wondering how to finance your studies? In this exclusive conversation, we discuss the collateral-free non-cosigner education loans...
Solve 30 high quality GMAT Focus practice questions in timed conditions. Take this GMAT practise test live with peers, analyze your GMAT study progress, and see where you stand in the GMAT student pool.
After just 3 months of studying with the TTP GMAT Focus course, Conner scored an incredible 755 (Q89/V90/DI83) on the GMAT Focus. In this live interview, he shares how he achieved his outstanding 755 (100%) GMAT Focus score on test day.
What do András from Hungary, Pablo from Mexico, Conner from the United States, Giorgio from Italy, Leo from Germany, and Rishab from India have in common? They all earned top scores on the GMAT Focus Edition using the Target Test Prep course!
Join us for an exclusive one-day event focused on mastering the GMAT and maximizing your preparation resources! Here's what you can expect: Don't miss out on this invaluable opportunity to supercharge your GMAT preparation journey.
Finding Ratio from Weighted Average
[#permalink]
21 Aug 2012, 04:28
I know we can find the ratio of two things from their weighted average. My query: Is it possible to calculate the ratio of three things from their weighted average?
Let's take an example:
A fruit shake contains fruit pulp, milk and ice. Fruit pulp costs $5 per liter, milk costs $4 per liter, and ice costs $2 per liter. If the cost of the fruit shake is $3 per liter (weighted average of the three ingredients), is the data sufficient to find the ratio of fruit pulp : milk : ice in the fruit shake?
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.
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.
Re: Finding Ratio from Weighted Average
[#permalink]
22 Aug 2012, 10:45
Expert Reply
rakesh.id wrote:
I know we can find the ratio of two things from their weighted average. My query: Is it possible to calculate the ratio of three things from their weighted average?
Let's take an example:
A fruit shake contains fruit pulp, milk and ice. Fruit pulp costs $5 per liter, milk costs $4 per liter, and ice costs $2 per liter. If the cost of the fruit shake is $3 per liter (weighted average of the three ingredients), is the data sufficient to find the ratio of fruit pulp : milk : ice in the fruit shake?
No, it's not possible unless you have more information. In your example, if you had 6 liters in total of fruit shake, you might have, say, 2 liters of fruit pulp, 0 liters of milk, and 4 liters of ice, or you might have 0 liters of milk, 3 liters of milk, and 3 liters of ice, among many other possibilities. So we can get different ratios from the given information.
Re: Finding Ratio from Weighted Average
[#permalink]
26 Aug 2012, 07:42
2
Kudos
Let's understand this possibility with the help of an equation
Considering two items: fruit pulp and milk Cost of fruit pulp = $ 5 per liter Cost of milk = $ 4 per liter if the cost of the mixture is 4.5 liter, just assume, we can find out their ratio. assume ratio is a:b So, forming the equation we get-
Considering three items: fruit pulp, milk and ice Here, cost of ice = $ 2 per liter Cost of fruit shake = $ 3 per liter If the ratio of fruit pulp, milk and ice is a:b:c we form the equation as follows- 5a + 4b + 2c = 3 (a+b+c) 2a+b-c=0
In this equation there are three variables. So, in no way we can find ratio of a,b,c
Note: To find values of n variables we need n equations to find ratio of n variables we need (n-1) equations
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.
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!
gmatclubot
Re: Finding Ratio from Weighted Average [#permalink]