Topic 4: Quantitative Reasoning: Word Problems And Applied Math

Lesson 4.3: Mixtures, Averages, And Weighted Averages — Quiz

Test your understanding of lesson 4.3: mixtures, averages, and weighted averages with 5 practice questions.

Practice Questions

Question 1

If a solution of saltwater contains 10% salt and you add 5 liters of pure water to it, what is the new percentage of salt in the solution if the initial volume of the solution was 20 liters?

Question 2

A bag contains 3 red marbles and 5 blue marbles. What is the average color ratio of red to blue marbles in simplest form?

Question 3

A solution has concentrations of $30\%$ and $70\%$ salt. If you mix $4$ liters of the first solution with $6$ liters of the second solution, what will be the weighted average concentration of salt in the final mixture?

Question 4

You have two solutions, one with $20\%$ salt and another with $60\%$ salt. If you mix $3$ liters of the first with $2$ liters of the second, what is the final concentration of the salt in the mixture?

Question 5

If a container has $15$ liters of a $40\%$ acidic solution, how much pure acid is in the solution?