# mixture problem

**Problem**

A given alloy contains 20% copper and 5% tin. How many pounds of copper and of tin must be melted with 100 lb of the given alloy to produce another alloy analyzing 30% copper and 10% tin? All percentages are by weight.

B. 17.5 lb copper and 7.5 lb tin

C. 19.5 lb copper and 5.5 lb tin

D. 18.5 lb copper and 6.5 lb tin

## 01 - Example of Mixture Related Problem

**Problem**

In a class experiment, a student needs 5 liters of 6% solution. He found a 4% and a 10% solution in the laboratory. How many liters of each solution should he mix in order to obtain 5 liters of 6% solution?

A. 3.33 liters of 4% and 1.67 liters of 10% solution

B. 1.67 liters of 4% and 3.33 liters of 10% solution

C. 3.67 liters of 4% and 1.33 liters of 10% solution

D. 1.33 liters of 4% and 3.67 liters of 10% solution

## Mixture-related Problems

## Verbal Problems in Algebra

The following is an attempt to classify the verbal problems.

**Number-related problems**

Number-related problems are considered as the most basic type of verbal problems. It is taken as the base point of analysis for more complex type of problems.