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 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 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 1006:00 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..
13 Mar 2025, 04:09
Kudos
Bookmarks
A: 150
B: 168
A chemist is mixing two powders, X and Y, to create an alloy. The final alloy must contain a specific ratio of X to Y for structural integrity. Two potential ratios are being tested:
• Ratio A: 3 grams of X to 2 grams of Y
• Ratio B: 11 grams of X to 10 grams of Y
The chemist starts with 90 grams of X and 80 grams of Y. The goal is to use the maximum amount of both powders without exceeding either supply.
Based on the above information, select for A the amount of the alloy that can be produced using Ratio A and for B the amount of the alloy that can be produced using Ratio B.
• Ratio A: 3 grams of X to 2 grams of Y
• Ratio B: 11 grams of X to 10 grams of Y
The chemist starts with 90 grams of X and 80 grams of Y. The goal is to use the maximum amount of both powders without exceeding either supply.
Based on the above information, select for A the amount of the alloy that can be produced using Ratio A and for B the amount of the alloy that can be produced using Ratio B.
| A | B | |
| 142 | ||
| 150 | ||
| 157 | ||
| 165 | ||
| 168 | ||
| 174 |
ShowHide Answer
Official Answer
A: 150
B: 168
13 Mar 2025, 04:09
Kudos
Bookmarks
Official Solution:
We are asked to figure out the maximum amount of alloy that can be made using each of the possible ratios.
The problem is that we don’t know which powder will be used up first. To figure this out, we can compare the ratio of X to Y. Originally, we have ratio of 90:80 or 1.125.
• Ratio A: 3:2 = 1.5 > 1.125. So, X will be used up first. This means that Ratio A will be used 90/3 = 30 times.
• Ratio B: 11:10 = 1.1 < 1.125. So, Y will be used first. This means that Ratio B will be used 80/10 = 8 times.
Now let’s find how much powder will be used altogether, as this should be the mass of the alloy.
• Ratio A: Is used 30 times, so 3*30 = 90 grams of X and 2*30 = 60 grams of Y. 90 + 60 = 150 grams of the alloy.
• Ratio B: Is used 8 times, so 11*8 = 88 grams of X and 10*8 = 80 grams of Y. 88 + 80 = 168 grams of the alloy.
Correct answer:
A "150"
B "168"
Bunuel
We are asked to figure out the maximum amount of alloy that can be made using each of the possible ratios.
The problem is that we don’t know which powder will be used up first. To figure this out, we can compare the ratio of X to Y. Originally, we have ratio of 90:80 or 1.125.
• Ratio A: 3:2 = 1.5 > 1.125. So, X will be used up first. This means that Ratio A will be used 90/3 = 30 times.
• Ratio B: 11:10 = 1.1 < 1.125. So, Y will be used first. This means that Ratio B will be used 80/10 = 8 times.
Now let’s find how much powder will be used altogether, as this should be the mass of the alloy.
• Ratio A: Is used 30 times, so 3*30 = 90 grams of X and 2*30 = 60 grams of Y. 90 + 60 = 150 grams of the alloy.
• Ratio B: Is used 8 times, so 11*8 = 88 grams of X and 10*8 = 80 grams of Y. 88 + 80 = 168 grams of the alloy.
Correct answer:
A "150"
B "168"
10 Jan 2026, 12:32
Kudos
Bookmarks
Hi Bunuel,
Thanks for sharing the solution and explaining well.
I am struggling to approach these questions efficiently, could you share similar questions to practice and reinforce necessary fundamentals?
Thanks.
Thanks for sharing the solution and explaining well.
I am struggling to approach these questions efficiently, could you share similar questions to practice and reinforce necessary fundamentals?
Thanks.
Bunuel
