SAT Math Multiple Choice Question 518: Answer and Explanation
8. On average, for every 2,500 cans of colored paint a home improvement chain mixes, exactly 40 are the wrong color (defective). At this rate, how many cans of paint were mixed during a period in which exactly 128 were defective?
- A. 5,200
- B. 7,500
- C. 8,000
- D. 64,000
Correct Answer: C
Category: Problem Solving and Data Analysis / Rates, Ratios, Proportions, and Percentages
Strategic Advice: When ratios involve large numbers, simplify if possible to make the calculations easier.
Getting to the Answer: Let p equal the number of cans of paint mixed. Set up a proportion and solve for p. Try writing the proportion in words first.