SOLUTION: Michelle is making hamburger, using 5lbs of ground beef that is 15% fat and 7lbs of ground beef that is 3% fat. What is total percentage of the fat in the mixture?

Question 1051788: Michelle is making hamburger, using 5lbs of ground beef that is 15% fat and 7lbs of ground beef that is 3% fat. What is total percentage of the fat in the mixture?
Found 3 solutions by josmiceli, stanbon, MathTherapy:
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!

The mixture is 7.25% fat

Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
Michelle is making hamburger, using 5lbs of ground beef that is 15% fat and 7lbs of ground beef that is 3% fat. What is total percentage of the fat in the mixture?
--------
Equation::
fat + fat = fat
0.15*5 + 0.03*7 = (x/100)(12)
----------
15*5 + 3*7 = 12x
75 + 21 = 12x
12x = 96
x = 8%
-----------
Cheers,
Stan H.
-------------
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!
Michelle is making hamburger, using 5lbs of ground beef that is 15% fat and 7lbs of ground beef that is 3% fat. What is total percentage of the fat in the mixture?

Amount of fat in 5 lb mixture: 5 * .15 = .75 lbs
Amount of fat in 7 lb mixture: 7 * .03 = .21 lbs
Total fat in 12 lb mixture: .75 lbs + .21 lbs = .96 lbs
Total mixture: 12 lbs
Total percentage in final mixture:
RELATED QUESTIONS
how much ground beef with 24% fat should be mixed with 9 lb of ground sirloin that is 6%... (answered by josgarithmetic,ikleyn)
Extra lean ground beef (16% fat) is served in the cafeteria. The kitchen has 8 lbs. of... (answered by stanbon)
A butcher has some hamburger that is 21% fat and some that is 15% fat. How many pounds of (answered by lwsshak3)
Amy is making small and large hamburger patties to store in her freezer. A small... (answered by MathLover1,josgarithmetic,greenestamps)
A butcher has some hamburger which is 4% fat and some hamburger which is 20% fat. How... (answered by htmentor)
A butcher has some hamburger that is 19% fat and some that is 12% fat. How many pounds of (answered by solver91311)
Can someone please help me? A butcher has some hamburger that is 21% fat and some that is (answered by longjonsilver)
A butcher has some hamburger that is 29% fat and some that is 15% fat. How many pounds of (answered by richwmiller,drk)
A butcher has some hamburger that is 21% fat and some that is 15% fat. How many pounds of (answered by josmiceli)