Civil Service Exam Reviewer · Percentage · hard
10 liters of a 30% alcohol solution are mixed with 40 liters of a 50% alcohol solution. What is the alcohol concentration of the mixture?
- 40%
- 80%
- 34%
- 46%
Answer
D. 46%
Solution
Pure alcohol = 3 + 20 = 23 L in 50 L → 46%.
More Percentage questions
- A town has a population of 22,000. If it grows by 8% each year, what will the population be after 2 years?
- After a 20% discount, a cellphone sells for ₱6,240. What was its original price?
- A receipt shows a VAT-inclusive total of ₱2,464. How much of this is the 12% VAT?
- The price of a product was increased by 15% and then decreased by 10%. What is the net percent change?
- A store gives successive discounts of 10% and 5%. What single discount is equivalent to these?
- An item bought for ₱2,900 is sold for ₱3,770. 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 60% in the midterm. What final exam score…
- By what percent must a price be marked up so that after a 25% discount, the selling price equals the original price?
- If A is 60% more than B, then B is what percent less than A?
- What is 25% of 25% of 700?