If after 250 grams of water were added to the 24%-solution of alcohol, the strength of the solution decreased by one-third, how much of the 24%-solution was used? Choose the correct choice from the following choices.
A) 180 grams	B) 220 grams	C) 250 grams	D) 350 grams	E) 500 grams
The 24% alcohol solution decreases by 1/3 once the 250 grams of water is added so  250/.08= 
<gadget id="calculator"> 250/.08</gadget>
<output>3_125</output>
3125*.16% (2/3 of 24%) is 500 grams, thus answer is 500 grams.
<result>E</result>
If after 250 grams of water were added to the 24%-solution of alcohol, the strength of the solution decreased by one-third, how much of the 24%-solution was used?