If after 100 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:  A) 180 grams  B) 200 grams  C) 250 grams  D) 350 grams  E) 400 grams
The 24% alcohol solution decreases by 1/3 once the 100 grams of water is added so  100/.08= 
<gadget id="calculator"> 100/.08</gadget>
<output>1_250</output>
1250*.16% (2/3 of 24%) is 200 grams, thus answer is 200 grams.
<result>B</result>
If after 100 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?