In what ratio water be mixed with milk costing Rs.12 per liter to obtain a mixture worth of Rs.8 per litre? Choose the correct choice from the following answers
A) 2:7	B) 1:2	C) 2:9	D) 2:2	E) 2:6
Answer with Explanation: By the rule of allegation, i. C.P of 1 liter of water = 0 ii. C.P of 1 liter of milk = 12 iii. Mean price (p) = 8 iv. d – m = 12-8= 
<gadget id="calculator">12-8</gadget>
<output>4</output>
4 v. m – c= 8-0= 
<gadget id="calculator">8-0</gadget>
<output>8</output>
8  Ratio of water and milk= 4 : 8 = 1 : 2   Answer:1:2
<result>B</result>
In what ratio water be mixed with milk costing Rs.12 per liter to obtain a mixture worth of Rs.8 per litre?