Posted by angel on .
There are three mixtures of equal capacity and all are completely filled with acid and water mixtures in diferent ratios.
The ratio of acid to water in the first container is 2:3 ,in second 3:7 and third 4:11.
If the mixtures of all the containers are mixed together ,what is the ratio of acid to water in it?

maths 
Steve,
(2+3+4):(3+7+11) = 9:21 = 3:7