• Group:
• GMAT
• Topic:
• GMAT Question of the Day
• Posted by:
• Len W.

If a portion of a half water/half alcohol mix is replaced with 25% alcohol solution, resulting in a 30% alcohol solution, what percentage of the original alcohol was replaced?

(A) 3%
(B) 20%
(C) 66%
(D) 75%
(E) 80%

 

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