In what ratio must water be mixed with milk costing Rs 32 per litre in order to get a mixture costin...........

Quantitative Aptitude (CGL) Mixture and Alligation

In what ratio must water be mixed with milk, costing Rs.32 per litre, in order to get a mixture costing Rs.28 per litre?

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ssc cgl 2023 pre

8:1

1:7

1:8

7:1

- We're mixing water and milk to achieve a specific price per litre for the mixture.

- The cost of milk alone is Rs.32 per litre.

- The desired cost of the mixture is Rs.28 per litre.

- Water costs Rs.0 per litre since it's effectively free in this context.

- To find the ratio for mixing, we use the concept of allegation or weighted average.

In simple terms, we calculate the difference:

- Difference in price when mixing with water: Rs.32 - Rs.28 = Rs.4

- Difference in price from the target to water: Rs.28 - Rs.0 = Rs.28

- To get the ratio of water to milk, divide these differences:

- Ratio of water to milk = Rs.4 : Rs.28

- Simplifying this gives 1 : 7

- Correct Answer: Option 2 - 1:7

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