A milkman claims to sell milk at its cost price, still, he is making a profit of 30% since he has mixed some amount of water in the milk. What is the % of milk in the mixture?
Explanation:
Let the milk he bought is 1000 ml
Let C.P of 1000 ml is Rs. 100
Here let he is mixing K ml of water
He is getting 30% profit
= Now, the selling price is also Rs. 100 for 1000 ml
= 100 : K%
= 100 : 30
10 : 3 is ratio of milk to water
= Percentage of milk = 10 x 100/13 = 1000/13 = 76.92%
Hence, option 3 is the correct answer.
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By: Amit Kumar