There are 3/4 of the bottle volume of the pure alcohol and 1/4 of the bottle volume of water in the 1-st bottle. There are 4/5 of the bottle volume of the pure alcohol and 1/5 of the bottle volume of water in the 2-nd bottle. So, the total volume of the pure alcohol is+ = = of the bottle volume. The total volume of water is + = = of the bottle volume. The ratio alcohol to water volumes in the mixture is thus . ANSWER