Solution X is 10 percent alcohol by volume, and solution Y is 30 percent alcohol by volume. How many milliliters of solution Y must be added to 200 milliliters of solution X to create a solution that is 14 percent alcohol by volume?
Choose the most appropriate option: A) 50 B) 100 C) 150 D) 200 E) 250
14% is 4%-points higher than 10% but 16%-points lower than 30%.   Thus there should be 4 parts of solution X for 1 part of solution Y.   We should add 50 ml of solution Y.   The answer is 50.
<result>A</result>
Solution X is 10 percent alcohol by volume, and solution Y is 30 percent alcohol by volume. How many milliliters of solution Y must be added to 200 milliliters of solution X to create a solution that is 14 percent alcohol by volume?