3 litres of a mixture containing wine and water in the ratio

3 litres of a mixture containing wine and water in the ratio 3 : 7 and 4 litres of another mixture containing wine and water in the ratio 3 : 5 are mixed together. What is the ratio of wine and water in the resulting mixture ?

In 3 litres of mixture ,

Wine =	3 " 3	;	9	litre
	10		10

Water =	7	" 3 ;	21	litre
	10		10

In 4 litres of mixture ,

Wine =	3	" 4 ;	3	litres
	8		2

Water =	5	" 4 ;	5	litres
	8		2

In resulting mixture ,
Wine : Water

=		9	)	3		:		21	)	5
		10		2				10		2

= 24 : 46 = 12 : 23