A container holding 12 ounces of a solution that is 1 part alcohol to 2 parts water is added to a container holding 4 ounces of a solution that is 1 part alcohol to 3 parts water. What is the ratio of alcohol to water in the resulting solution?  Select the correct option.
A) 2:5 B) 3:7 C) 3: 5 D) 5:11 E) 7:3
Container 1 has 12 ounces in the ratio 1:2   or,   x+2x=12 gives x(alcohol)=4 and remaining water =8   container 2 has 4 ounces in the ratio 1:3   or,   x+3x=4 gives x(alcohol)=1 and remaining water =3   mixing both we have alcohol=4+1 and water =8+3   ratio thus alcohol/water =5/11   Answer 5:11
<result>D</result>
A container holding 12 ounces of a solution that is 1 part alcohol to 2 parts water is added to a container holding 4 ounces of a solution that is 1 part alcohol to 3 parts water. What is the ratio of alcohol to water in the resulting solution?