SOLUTION: What is the alcohol percentage of this mix: .75 liter of 30% .5 liter of 40% .25 liter of 90% There are times when I need to mix 2 or 3 different % alcohols, and need an equa

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: What is the alcohol percentage of this mix: .75 liter of 30% .5 liter of 40% .25 liter of 90% There are times when I need to mix 2 or 3 different % alcohols, and need an equa      Log On

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Question 953786: What is the alcohol percentage of this mix:
.75 liter of 30%
.5 liter of 40%
.25 liter of 90%
There are times when I need to mix 2 or 3 different % alcohols, and need an equation to figure out the alcohol % of the mix.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Find AMOUNTS of alcohol in each one
of the mixes
-----------------
+.3%2A.75+=+.225+ liters
+.4%2A.5+=+.2+ liters
+.9%2A.25+=+.225+ liters
----------------------
+.225+%2B+.2+%2B+.225+=+.65+ liters of alcohol
----------------------
Add the liters of mixtures:
+.75+%2B+.5+%2B+.25+=+1.5+ liters of mixture
----------------------
+.65+%2F+1.5+=+.43333+
+.43333%2A100+=+43.333+
The alcohol percentage is:
43 and 1/3 %