A 30% alcohol mixture is added to a 50% alcohol mixture to form a 10 litre mixture of 45% alcohol. How much of the 30% mixture was used?	Pick one
A) 1.5 liters B) 2.5 liters C) 3.5 liters D) 4.5 liters E) 5.5 liters
solution A=50% solution solution b=30% solution   30%-45% =15% solution B   50%-45%=5% solution A   so the ratio is 3:1 for 30%:50% solutions   3/4 *10 liter50 -45= 
<gadget id="calculator">50 -45</gadget>
<output>5</output>
5% solution A   so the ratio is 3:1 for 30%:50% solutions     3/4 *10= 
<gadget id="calculator">  3/4 *10</gadget>
<output>15/2 = around 7.5</output>
7.5 for 30% solution and 2.5 for 50% solution..   ANSWER:2.5 liters
<result>B</result>
A 30% alcohol mixture is added to a 50% alcohol mixture to form a 10 litre mixture of 45% alcohol. How much of the 30% mixture was used?