A 40% antifreeze solution and a 70% antifreeze solution is mixed to make 12 gallons of 50% antifrezze solution. How many gallons of each antifreeze solution should be used.

• here applying mixture rule, we get, cprpotion of 40% and 70% antifreezing is 2:1 which implies 8 gallons of 40% and 4gallons of 70% anti freeze solution
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