12 litres of a mixture has wine and water in the ratio 2

12 litres of a mixture has wine and water in the ratio 2 : 3 . How much water must be added to get wine to water ratio of 3 :7 in the resultant mixture ?

In the given mixture , wine : wate r = 2 : 3

Fraction of water in the given mixture =	3
	5

For water to be added , fraction = 1

Fraction of water in the resultant mixture =	7
	10

So , water must be added to the mixture in the ratio 1 : 3 .
Quantity of water to be added

=	1	" 12 ; 4 litres.
	3