4 vessels of equal sizes contains mixture of spirit and

4 vessels of equal sizes contains mixture of spirit and water. The concentration of spirit in 4 vessels are 60 %, 70 %, 75 % and 80 % respectively. If all the 4 mixtures are mixed, find in the resultant mixture the ratio of spirit to water —

Given : - The concentration of spirit in 4 vessels are 60%, 70%, 75% and 80% respectively.
Ratio of spirit to water in the different vessels

⇒	60	= 3 : 2,		75	= 3 : 1,
	40			25

70	= 7 : 3,		80	= 4 : 1
30			20

Now, applying the given rule,

we have the required ratio =		3	+	7	+	3	+	4		:		2	+	3	+	1	+	1
		5		10		4		5				5		10		4		5

Required ratio =	12 + 14 + 15 + 16	:	6 + 6 + 5 + 4
	20		20

Required ratio = 57 : 23.