Civil Service Exam Reviewer · Percentage · hard
15 liters of a 40% alcohol solution are mixed with 10 liters of a 70% alcohol solution. What is the alcohol concentration of the mixture?
- 55%
- 110%
- 52%
- 58%
Answer
C. 52%
Solution
Pure alcohol = 6 + 7 = 13 L in 25 L → 52%.
More Percentage questions
- A town has a population of 53,000. If it grows by 6% each year, what will the population be after 2 years?
- A trader marks up an item costing ₱500 by 40%, then sells it at a 10% discount. What is the percent profit based on cost?
- After a 10% discount, a cellphone sells for ₱4,680. What was its original price?
- A receipt shows a VAT-inclusive total of ₱8,204. How much of this is the 12% VAT?
- The price of a product was increased by 25% and then decreased by 15%. What is the net percent change?
- A store gives successive discounts of 40% and 25%. What single discount is equivalent to these?
- An item bought for ₱1,550 is sold for ₱2,325. What is the profit as a percent of the SELLING price?
- In a municipality survey of 1,200 residents, 40% are women and 25% of the women are employed. How many employed women were surveyed?
- What is 60% of 50% of 500?
- The length of a rectangle is increased by 50% and its width is decreased by 50%. What is the percent change in its area?