UGC NET Mixtures and alligation Previous Year Questions
JRFSmart holds 6 previous-year questions on Mixtures and alligation from UGC NET Paper 1 (Teaching and Research Aptitude), filed under Unit 5: Mathematical Reasoning and Aptitude, drawn from 6 of the 87 exam papers in the bank (2023–2025). Each question can be practised with a full explanation and shows how often NTA has returned to the same idea.
What is asked in Mixtures and alligation
The questions in this topic fall under these subtopics, ordered by how many previous-year questions each has.
| Subtopic | Questions |
|---|---|
| Adulteration and profit | 1 |
| Replacing part of a mixture | 1 |
| Adding to change a ratio | 1 |
| Adding water to reduce value per litre | 1 |
| Milk and water with profit | 1 |
| Combining two mixtures | 1 |
NTA repeat analysis
Mixtures and alligation appears in 6 of 87 papers (7%), which JRFSmart rates as low frequency.
Sample previous-year questions
A shopkeeper buys milk at a cost of Rs. 60 per kilo. After mixing water (free of cost) in it, he sells the milk to customers at a price of Rs. 62 per kilo and earns a profit of 10%. In what ratio does he mix milk and water ?
Two identical containers P and Q contain mixture of milk and water in the ratio 1 : 1 and 3 : 1, respectively. In what ratio should mixtures be taken out from P and Q so that milk to water ratio becomes 5 : 4 ?
A milkman buys 20 litres of milk from a dairy at the cost of Rs. 50 per litre. He also purchases some mineral water at the rate of Rs 20 per litre and adds it to the milk. He then sells the adulterated milk at the rate of Rs 60 per litre and makes a profit…
[Hindi] A milkman has a mixture of milk in which the ratio of milk and water is 7 : 4. He sells 55 litres of this mixture and mixes 20 litres of pure water into the mixture. Now the ratio of milk and water in the mixture becomes 7 : 6. Find the new quantity…
The ratio of water and milk in a 27 litre mixture is 5 : 4. Find the quantity of water to be added to the mixture in order to make the ratio of water and milk as 3 : 1.
How much water (free of cost) should be added to 18 litres of milk worth Rs. 70 per litre so that the value of the mixture is Rs. 60 per litre?
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