<PRE><B>Question 101300</B>
5floz. of a 2% alcohol solution was mixed with 11floz. of a 66% alcohol solution. Find the concentration of the new mixture.

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5 fl oz of 2% has 0.02*5 = 0.10 oz active ingredient
11 fl oz of 66% has 7.26 oz of active ingredient
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A mixture of the two would give you 16 fl oz with 7.26+0.10 oz = 7.36 oz 
of active ingredient or 7.36/16 = 46% concentration.
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Cheers,
Stan H.</PRE>