- A1:4
- B2:5
- C1:6
- D1:5
Step-by-Step Solution
Selling at cost price of milk for a 20% gain means the mixture's cost is 100/120 of the milk's price. By alligation, water : milk = 20 : 100 = 1 : 5.
Answer: D) 1:5
In what ratio must water be mixed with milk so that by selling the mixture at the cost price of milk a trader gains 20%?
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