Civil Service Exam Reviewer · Percentage · hard
30 liters of a 30% alcohol solution are mixed with 35 liters of a 80% alcohol solution. What is the alcohol concentration of the mixture?
- 55%
- 56.92%
- 110%
- 53.08%
Answer
B. 56.92%
Solution
Pure alcohol = 9 + 28 = 37 L in 65 L → 56.92%.
More Percentage questions
- A town has a population of 6,000. If it grows by 5% each year, what will the population be after 2 years?
- A receipt shows a VAT-inclusive total of ₱6,944. How much of this is the 12% VAT?
- The price of a product was increased by 20% and then decreased by 15%. What is the net percent change?
- A store gives successive discounts of 20% and 15%. What single discount is equivalent to these?
- An item bought for ₱900 is sold for ₱990. What is the profit as a percent of the SELLING price?
- A final grade is computed as 60% from the midterm and 40% from the final exam. A student scored 89% in the midterm. What final exam score…
- By what percent must a price be marked up so that after a 20% discount, the selling price equals the original price?
- In a municipality survey of 300 residents, 55% are women and 80% of the women are employed. How many employed women were surveyed?
- What is 50% of 50% of 1,100?
- The length of a rectangle is increased by 30% and its width is decreased by 40%. What is the percent change in its area?