SOLUTION: how much of a 40% solution of alcohol and how much of 80% solution should be mixed to give a reduced concentration of 16% solution?

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Question 765607: how much of a 40% solution of alcohol and how much of 80% solution should be mixed to give a reduced concentration of 16% solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
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This is impossible. Any ratio between these two alcohol solutions will be between 40 and 80 percent. Anything lower cannot be made unless you want to dilute with some liquid that contains no alcohol.