There are two mixtures of sugar and water the quantity of sugar in them being 20 and 80 of the mixtu...........

Quantitative Aptitude (CDS) Mixture and Alligation

There are two mixtures of sugar and water, the quantity of sugar in them being 20% and 80% of the mixture. If 2 gallons of the first are mixed with 4 gallons of the second, what will be the ratio of sugar to water in the new mixture?

1:3

1:2

2:3

3:2

Explanation:

If 2 gallons of first and 4 gallons of second , the percentage of sugar in the new mixture would be
( 2×20 + 4×80 ) / 6 = (40 + 320) / 6
= 360/6 = 60%
The ratio of sugar to water in the new mixture would be
= 60:40 = 3:2