Free Practice Question
PS · Problem Solving
sub-505
Mixture
In a mixture of aluminum and zinc, there are 8 pounds of zinc for every 4 pounds of aluminum. If a total of 240 pounds of this mixture is created, how many pounds of aluminum are needed?
Answer Choices
Correct answer marked belowA
30
B
60
80
Correct
D
90
E
120
See the full step-by-step explanation
You can see the correct answer above. Sign in for free to unlock the complete worked solution.
Track your performance and improve
Get detailed analytics, unlock full explanations, and move up difficulty tiers as you practice.
Explanation
Preview
Official Explanation
Official
The ratio of Zinc to Aluminum is 8:4, which simplifies to 2:1. In 240 pounds of the mixture, the amount of…
Read the full explanation
Sign in for free to see the complete step-by-step solution to this question.
Comments
2
Sign in to join the discussion
M
monojApr 20, 2024
this pattern comes up frequently
N
NaomiMay 22, 2024
Can you explain more?
What this question tests
What it tests
Your ability to reason about weighted averages and the composition of mixtures.
Common trap
Averaging the percentages of two solutions without weighting by their volumes.
Details
Difficulty
sub-505
Type
PS
Category