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 300 milliliters of solution X to create a solution that is 22 percent alcohol by volume?	Answers:
A) 300	B) 350	C) 400	D) 450	E) 500
22% is 12%-points higher than 10% but 8%-points lower than 30%.   Thus there should be 2 parts of solution X for 3 parts of solution Y.   We should add 450 ml of solution Y.   The answer is 450.
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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 300 milliliters of solution X to create a solution that is 22 percent alcohol by volume?