Fundamentals of Ratio and Proportion

Fundamentals of Ratio and Proportion

#### A mixture contains 20 liters of 30% acid solution and 30 liters of 10% acid solution. What is the percentage of acid in the final mixture? 1. [ ] 18% 2. [x] 18.75% 3. [ ] 22% 4. [ ] 25% #### If the ratio of the number of males to the number of females in a company is 3:2 and there are 150 males, how many total employees are there in the company? 1. [ ] 225 2. [x] 250 3. [ ] 275 4. [ ] 300 #### If 15 workers can complete a task in 12 days, how many workers will be needed to complete the same task in 4 days? 1. [ ] 60 2. [x] 45 3. [ ] 36 4. [ ] 30 #### If the ratio of the number of students in three classes is 2:3:4 and the total number of students is 126, how many students are in the first class? 1. [x] 28 2. [ ] 48 3. [ ] 54 4. [ ] 56 #### In a solution of water and alcohol, the ratio of water to alcohol is 3:1 If there are 12 liters of water, how much alcohol is there in the solution? 1. [ ] 3 liters 2. [x] 4 liters 3. [ ] 5 liters 4. [ ] 6 liters