Vessel A has liquids X and Y in the ratio X:Y=8:7. Vessel B holds a mixture of X and Y in the ratio X:Y=5:9. What ratio should you mix the liquids in both vessels if you need the mixture to be X:Y=1:1?
<spanclass=′latex−bold′>(A)</span>4:3<spanclass=′latex−bold′>(B)</span>30:7<spanclass=′latex−bold′>(C)</span>17:25<spanclass=′latex−bold′>(D)</span>7:30